Manuel d'utilisation / d'entretien du produit Q20 du fabricant Alesis
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A L ES I S Q 20 U s e r M anua l.
Q20 Reference Manual 1 Introduction Thank you for purchasing the Alesis Q20 Professional 20-Bit Master Effects Processor. To take full advantage of of the Q20Õs fuctions, and to enjoy long and trouble free use, please read this userÕs manual carefully.
2 Q20 Reference Manual.
Contents Q20 Reference Manual 3 C ONTENTS 1: Setting Up ................................................................................ 7 Unpacking and Inspection .......................................................................................
Contents 4 Q20 Reference Manual Multiband EQs ...........................................................................................3 4 5 Band Graphic EQ .....................................................................................3 4 Resonator .
Contents Q20 Reference Manual 5 4: Making Your Own Programs ................................................ 5 5 Getting Started ......................................................................................................5 5 Programming A Single Block .
Contents 6 Q20 Reference Manual Effect Parameters ...................................................................................................8 1 Equalization .....................................................................................
Contents Q20 Reference Manual 7.
Setting Up - Chapter 1 Q20 Reference Manual 7 C HAPTER 1 S ETTING U P Unpacking and Inspection Your Q20 was packed carefully at the factory, and the shipping carton was designed to protect the unit during shipping. Please retain this container in the highly unlikely event that you need to return the Q20 for servicing.
Chapter 1 - Setting Up 8 Q20 Reference Manual Audio Connections The connections between the Q20 and your studio are your musicÕs lifeline, so use only high quality cables. These should be low-capacitance shielded cables with a stranded (not solid) internal conductor and a low-resistance shield.
Setting Up - Chapter 1 Q20 Reference Manual 9 Interfacing Directly with Instruments When connecting audio cables and/or turning power on and off, make sure that all devices in your system are turned off and the volume controls are turned down. The Q20 has two balanced inputs and two balanced outputs.
Chapter 1 - Setting Up 10 Q20 Reference Manual Interfacing to a Mixing Console The Q20 handles mono or stereo sends at all system levels. The input circuitry of the Q20 can easily handle +4 dBu levels (+17.5 dBu peaks), while having enough input and output gain to interface with the lower -10 dBV signal levels of many recording systems.
Setting Up - Chapter 1 Q20 Reference Manual 11 Setting the Effect/Dry Balance No matter where you connect the output of the Q20 into the mixer, you are in control of the balance between the mixerÕs channel inputs (the uneffected signal being routed to the aux sends and the Mix) and the effect returns coming from the Q20.
Chapter 1 - Setting Up 12 Q20 Reference Manual Mono In - Stereo Out. If you only want to feed the Q20 a mono input, but wish to connect both of its outputs back to the mixer, you will need three audio cables.
Setting Up - Chapter 1 Q20 Reference Manual 13 Using Inserts By using individual channel inserts, you can dedicate the Q20 to a specific channel (or pair of channels) on the mixer. The Insert connections on the back of the mixer provide a way of ÒinsertingÓ external processing equipment into the signal path.
Chapter 1 - Setting Up 14 Q20 Reference Manual Stereo. In the case where a stereo instrument, such as a keyboard or sampler, is connected to two separate channels of a mixing console, you will need two 1/4" TRS cables, one for each channel. The connection is made in a similar fashion as described above.
Setting Up - Chapter 1 Q20 Reference Manual 15 When to use Balanced Connectors There are three options for connecting analog audio to the Q20: 1/4Ó unbalanced, 1/4Ó balanced (TRS) and XLR balanced. If your source and destination use balanced connectors, you should try to stay balanced throughout the chain.
Chapter 1 - Setting Up 16 Q20 Reference Manual MIDI MIDI is an internationally-accepted protocol that allows music-related data to be conveyed from one device to another.
Setting Up - Chapter 1 Q20 Reference Manual 17 Footswitches On the rear panel you will find two footswitch jacks labeled [ADVANCE] and [BYPASS]. Any momentary single-pole/single-throw footswitch, normally open or normally closed, will work for the two footswitch functions.
Chapter 1 - Setting Up 18 Q20 Reference Manual Tap Tempo Either footswitch jack can be used to provide a tap tempo source for setting delay time, provided the selected Program uses one of the two available tap tempo delay types.
Your First Session with the Q20 - Chapter 2 Q20 Reference Manual 19 C HAPTER 2 Y OUR F IRST S ESSION W ITH T HE Q20 Powering Up After making your connections, turn on the systemÕs power using this pr.
Chapter 2 - Your First Session with the Q20 20 Q20 Reference Manual The Value/Enter Knob Located just to the right of the custom LCD display, the [VALUE/ENTER] knob is used to select Programs and adjust parameter values that appear in the display. However, it is not just a knob, it is also a button.
Your First Session with the Q20 - Chapter 2 Q20 Reference Manual 21 Auditioning Internal Programs You can audition the Programs in the Q20 by using the [VALUE/ENTER] knob or the front panel buttons, whenever the Q20 is in Program mode (the [PROGRAM] buttonÕs LED will be lit).
Chapter 2 - Your First Session with the Q20 22 Q20 Reference Manual Example Programs The following are descriptions of the three example Programs in the Preset bank. 96: “VerbOfMyDreams” This Program is fairly simple in design, using only 3 Blocks to provide EQ, Delay and Reverb.
Your First Session with the Q20 - Chapter 2 Q20 Reference Manual 23 Adjusting Effects Levels Although we may not want to get started editing Programs just yet (thatÕs left for Chapter 4), it is usual.
Chapter 2 - Your First Session with the Q20 24 Q20 Reference Manual ➇ Use the [< BLOCK >] buttons to select other Blocks, and adjust their levels, as described above. Mix parameters affect the Program and are only temporary unless the Program is stored into memory before a another Program is recalled.
Your First Session with the Q20 - Chapter 2 Q20 Reference Manual 25 Storing Edited Programs Once you are satisfied with the changes you have made to a Program, or are creating a new Program from scratch, you will need to store your edited Program back into memory.
Chapter 2 - Your First Session with the Q20 26 Q20 Reference Manual Bypassing Effects At any time you can bypass all effects at once, thereby allowing the direct signal to pass through the Q20 unchanged.
Overview - Chapter 3 Q20 Reference Manual 27 C HAPTER 3 O VERVIEW The Architecture of the Q20 The Q20 provides eight Effect Blocks per Program, each of which can serve as either EQ, Pitch, Delay or Reverb. The display shows these Blocks from first to last, between the L/R IN (left and right inputs) and the L/R OUT (outputs).
Chapter 3 - Overview 28 Q20 Reference Manual ROUTING. Once a Block is defined, you must select its input source and route its outputs either to another BlockÕs input or to the L OUT or R OUT. This is done in Routing Page 1. Once an input source is selected, you can adjust its level feeding to the BlockÕs input using Routing Page 2.
Overview - Chapter 3 Q20 Reference Manual 29 Quick Route A new feature has been added to greatly simplify the task of creating Programs, especially a 1-Block Program.
Chapter 3 - Overview 30 Q20 Reference Manual processing within the block itself (for example, a boost in EQ or feedback in a chorus or delay). Output clipping can be controlled using the Master Effects Level parameter in the [MIX] function.
Overview - Chapter 3 Q20 Reference Manual 31 DSP. The DSP (Digital Signal Processor) chip inside the Q20 is what processes all signals in the digital domain and creates all of the effects (sometimes with the assistance of the microprocessor). The DSP chip has a limit to how many instructions (per sample) it can handle.
Chapter 3 - Overview 32 Q20 Reference Manual Equalization Equalization, or EQ, provides the ability to control the timbre, or coloration, of an audio signal by changing the frequency response of a Q20 audio path. Filters and EQ can be used to compensate for frequency deficiencies in microphones and other sound equipment.
Overview - Chapter 3 Q20 Reference Manual 33 Shelving EQs Lowpass Shelf and Highpass Shelf A shelving EQ can boost or cut frequencies in its pass band, while allowing the frequencies outside its pass band to go through it. The shelving EQs of the Q20 provide gains from -14dB to +14dB in 0.
Chapter 3 - Overview 34 Q20 Reference Manual Multiband EQs 2 Band Sweep Shelf EQ, 3 Band Parametric EQ, and 4 Band Parametric EQ Multiband EQs can be used to flexibly and accurately tailor the tonality of a signal.
Overview - Chapter 3 Q20 Reference Manual 35 Resonator A resonator is a special filter whose response is so sharp that it actually imparts a pitch to any signal going through it. By tuning the resonator to your instrument and balancing their relative amplitudes you can accentuate different harmonics in a guitar tone, for instance.
Chapter 3 - Overview 36 Q20 Reference Manual Overdrive Two new distortion effect types finish out the set of EQ effects: Soft Overdrive and Hard Overdrive. The Soft Overdrive has less gain and provides slightly less distortion than the Hard Overdrive.
Overview - Chapter 3 Q20 Reference Manual 37 Triggered Panning with Doppler This EQ Type creates the effect of audio moving back and forth between the left and right outputs.
Chapter 3 - Overview 38 Q20 Reference Manual Trigger Source Trigger Source (Parameter mode, Page 4) determines what will trigger the Panning effect. This can be set to: Audio Left, Audio Right, Audio L & R, Advance Footswitch or Bypass Footswitch.
Overview - Chapter 3 Q20 Reference Manual 39 Pitch Effects The Pitch effects alter the pitch of a signal in various ways to produce ÒlayeredÓ timbres that are more complex than the original signal.
Chapter 3 - Overview 40 Q20 Reference Manual Quad Chorus Quad Chorus modulates four delayed signals, each with its phase offset by 90 ° . Each of the four signals has a separate Predelay parameter, allowing you to change the ÒrhythmÓ of the phasing.
Overview - Chapter 3 Q20 Reference Manual 41 Stereo Flanging In the case of the Stereo Flange, the signal is split into three parts with a dry signal and a separate Delay section for both left and right channels with one channel flanging up while the other channel flanges down.
Chapter 3 - Overview 42 Q20 Reference Manual Pitch Shifter This effect type shifts the pitch of the input signal by a fixed amount. This creates a thickening effect similar to the difference between a 12-string and 6-string guitar.
Overview - Chapter 3 Q20 Reference Manual 43 Sweeping Mode The Sweeping Mode parameter (Parameter mode, Page 3) determines whether the Flanger effect will occur only once, or continuously. ¥ When set to ONE CYCLE ONLY, the Flanger effect (when triggered) will cycle once, and then stop until it is triggered again.
Chapter 3 - Overview 44 Q20 Reference Manual Delay Delay provides a discrete repetition of a signal. By adding feedback within the effect, the delayed signal can repeat many times, with each successive decay softer than its predecessor.
Overview - Chapter 3 Q20 Reference Manual 45 Sampling Once a Block is de-fined as a Delay function, you can select the Sampler effect type. The Sampler has one mono input and one mono output. Two Sampler Blocks can be used in a single Program to provide stereo sampling (one for the Left channel, the other for the Right).
Chapter 3 - Overview 46 Q20 Reference Manual If you attempt to trigger sample playback when no audio has been sampled, the display will temporarily read: SAMPLE BUFFER IS EMPTY Rec The Rec parameter (also found on Page 1 of Parameter Mode), determines how recording of audio shall begin.
Overview - Chapter 3 Q20 Reference Manual 47 Start and End Pointers The Start and End parameters (Parameter Mode, Page 3) serve as ÒpointersÓ which determine the section of recorded audio the Sample Buffer will play back when triggered.
Chapter 3 - Overview 48 Q20 Reference Manual Rec Trigger The Rec Trigger parameter (Parameter Mode, Page 5) determines what will trigger the recording of audio into the Sample Buffer. ¥ When set to ENTER, recording will only be triggered by pressing the [VALUE/ENTER] button while the Rec parameter is selected.
Overview - Chapter 3 Q20 Reference Manual 49 Reverberation Reverb is made up of a large number of distinct echoes, called reflections. In a natural acoustic space, each reflectionÕs amplitude and brightness decays over time.
Chapter 3 - Overview 50 Q20 Reference Manual Plate 2 A richer version of Plate 1 which uses more processing power for more density and a smoother decay.
Overview - Chapter 3 Q20 Reference Manual 51 Reverb Parameters Most of the reverb effects in the Q20 operate under the same set of control parameters, which are listed and described in this section.
Chapter 3 - Overview 52 Q20 Reference Manual Input High Frequency Roll Off This is a lowpass filter that can be set between 200Hz and 20kHz, and attenuates all frequencies above this value by 6dB per octave. Predelay All the reverb effects also have pre-delay parameters.
Overview - Chapter 3 Q20 Reference Manual 53 Gating Of all the different reverb types, only two types do not provide gating parameters (ÒReverseÓ and ÒNonlinearÓ). Gating is the process which abruptly cuts off the reverbÕs decay for a more ÒchoppyÓ sound.
Chapter 3 - Overview 54 Q20 Reference Manual.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 55 C HAPTER 4 M AKING Y OUR O WN P ROGRAMS Getting Started Because the Q20Õs custom LCD display clearly shows the audio routings between each of the 8 possible Effect Blocks, creating and modifying your own patches is extremely easy and flexible.
Chapter 4 - Making Your Own Programs 56 Q20 Reference Manual Programming A Single Block Type A Block can provide Equalization, Pitch, Delay, Reverberation or be turned OFF. A program can contain up to eight Blocks, which can be in almost any combination or order within the confines of available DSP memory.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 57 Routing Routing is the Function used to connect audio between the L/R IN and the Effect Blocks and the L/R OUT. We must route audio to both the inputs and outputs of our EQ Block in order to hear its effect.
Chapter 4 - Making Your Own Programs 58 Q20 Reference Manual You should set the level to accommodate the headroom the effect will need. For example, even if the front panel input levels are below clipping, if you boost an EQ band, it can distort the internal processor of the Q20.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 59 We have now connected the output of the EQ to our Right output. Having connected both an input and output to our EQ Block, we can now hear the effect and change the parameters. Parameter Now we will choose the desired parameters for our EQ.
Chapter 4 - Making Your Own Programs 60 Q20 Reference Manual Set the Q to a small number to effect the specific frequency you selected, or to a larger number to affect a wider range of frequencies centered around the selected frequency. Continue editing the remaining EQ parameters in a similar manner.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 61 Programming Multiple Blocks When you start adding more Blocks, the same principles apply as described in the previous section. However, the routing options begin to increase, since, as you add more Blocks, the number of input sources increases.
Chapter 4 - Making Your Own Programs 62 Q20 Reference Manual Deleting Unnecessary Routings Now that weÕve added our new Blocks, we want to reroute the signals so that the EQ output no longer directly feeds the L/R OUT, but instead goes into the Delay Block, and then into the Reverb Block.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 63 ➆ Turn the [VALUE/ENTER] knob until the display looks like this: ADD ROUTE FROM: D LY 2 MIX ➇ Press [VALUE/ENTER] to select the route. The display will flash until the [VALUE/ENTER] button is pressed.
Chapter 4 - Making Your Own Programs 64 Q20 Reference Manual Moving, swapping and copying blocks Block Move A third page is included in Type mode which allows you to move a defined Block to another position.
Making Your Own Programs - Chapter 4 Q20 Reference Manual 65 Block Copy & Paste It is also possible to duplicate a single effect block, including all of its parameter settings, into any other User Program. This feature is called Block Copy & Paste, and it is found in Type mode, Page 4.
Chapter 4 - Making Your Own Programs 66 Q20 Reference Manual Changing Effect Types If you already have defined a Block and assigned its routings, you can still change its Function and Effect Type.
Description of Controls - Chapter 5 Q20 Reference Manual 67 C HAPTER 5 D ESCRIPTION OF C ONTROLS Front Panel Input Level Left and Right : These concentric knobs (one within the other) control the incoming level of our analog signal, and the relative balance between the two input channels.
Chapter 5 - Description of Controls 68 Q20 Reference Manual Note: This illustration shows all display flags and routes (Òpatch cordsÓ) turned on at once. Actual displays show only some of these at any time. DIG. IN. Illuminates if the INPUT AUDIO SOURCE is switched to OPTICAL DATA in the Global functions.
Description of Controls - Chapter 5 Q20 Reference Manual 69 Deferred. The desired value is selected by turning the [VALUE/ENTER] knob, but the new value will only take effect after the [VALUE/ENTER] button has been pressed. The newly selected value will flash in the display until it is selected in this manner.
Chapter 5 - Description of Controls 70 Q20 Reference Manual Store Once you have created a new Program you can press [STORE] to store it. The [STORE buttonÕs LED will light.
Description of Controls - Chapter 5 Q20 Reference Manual 71 Bypass Each time the [BYPASS] button is pressed, Bypass mode is toggled on and off. When Bypass mode is engaged, its LED will light. This bypasses the effects chain allowing you to make an instant comparison between the effected signal and the clean signal.
Chapter 5 - Description of Controls 72 Q20 Reference Manual Type Use the [TYPE] button to define the type of effect in the selected Block. Once a Block has been chosen and the [TYPE] button is pressed, we can dial through with the [VALUE/ENTER] knob to choose the function of that Block from EQUALIZATION, PITCH, DELAY, REVERBERATION or OFF.
Description of Controls - Chapter 5 Q20 Reference Manual 73 Routing In order for us to hear our signal through the Q20 it must be routed from input to output. Also in order for us to hear our effects, the signal must be routed through the Blocks that contain our chosen effects.
Chapter 5 - Description of Controls 74 Q20 Reference Manual Global When the [GLOBAL] button is pressed, its LED will light. The [GLOBAL] button gives us access to the following settings which affect the entire instrument: Page 1: Adjust Display Contrast: 1Ð10.
Description of Controls - Chapter 5 Q20 Reference Manual 75 Page 6: Dig In/Out Channels. When using the Alesis Optical DIGITAL [IN] connector, (Input Audio Source must be set to ÒOPTICAL DATAÓ, see above), this page allows you to select which of the 8 channels on the optical buss will be routed to the L and R IN.
Chapter 5 - Description of Controls 76 Q20 Reference Manual Name Selecting this button allows us to name, edit a name or rename a Program. Names can contain up to 14 Characters and are selected by turning the [VALUE/ENTER] knob. The cursor is positioned by using the [< PAGE >] buttons.
Description of Controls - Chapter 5 Q20 Reference Manual 77 Page 3: Program Table. The Program Table allows you to intercept incoming program change messages and have them recall specific Programs (in either the Preset bank or the User bank) which may not be the same number value as the program change message received.
Chapter 5 - Description of Controls 78 Q20 Reference Manual Modulation The Q20 allows you to set up to 8 modulation routings which can control almost any parameter within a Program in realtime. This is especially useful for live applications, where the performer can actually interact or automate the changes in one or more effects.
Description of Controls - Chapter 5 Q20 Reference Manual 79 Rear Panel Power This is a standard IEC-spec power jack for the internal universal power supply. This supply works with almost any power source worldwide, from 90-265VAC, 50- 60Hz. The Q20 comes with a line cord suitable for the destination to which the keyboard is shipped.
Chapter 5 - Description of Controls 80 Q20 Reference Manual Digital In - ADAT Digital Audio In This is an EIAJ fiber optic jack which connects to the ADAT optical interface for receiving two of any eight digital audio channels. See Chapter 7 for more information.
Description of Controls - Chapter 5 Q20 Reference Manual 81 Effect Parameters The following charts are designed to act as a Òroad mapÓ to assist you in locating parameters and their value ranges.
Chapter 5 - Description of Controls 82 Q20 Reference Manual Pitch Pitch Type Parameters Page# Mono Chorus S p ee d : 0 - 9 9 , D e pt h : 0-99, Feedback: 0-99 1 Chorus PreDelay: 0-100mS 2 Chorus Shape.
Description of Controls - Chapter 5 Q20 Reference Manual 83 Delay Delay Type Parameters Page # Mono Delay Delay Time: 0.1-5000mS, Beat Count: 1/2, 1/4., 1/4, 1/4T, 1/8., 1/8, 1/8T, 1/16, 1/32 (. = dotted, T = triplet) 1 Feedback: 0-99 2 Stereo Delay Left Delay: 0.
Chapter 5 - Description of Controls 84 Q20 Reference Manual Reverberation Reverb Type Parameters Page # Mono Room Decay: 0-99, Damping Hi: 0-99, Lo: 0-99 1 Reverb Density: 0-99, Diffusion: 0-99 2 High.
Description of Controls - Chapter 5 Q20 Reference Manual 85 Reverb Type Parameters Page # Hall 2 Decay: 0-99, Damping Hi: 0-99, Lo: 0-99 1 Reverb Density: 0-99, Diffusion: 0-99 2 High Frequency Roll O.
Chapter 5 - Description of Controls 86 Q20 Reference Manual Reverb Type Parameters Page # Spring Decay: 0-99, Damping Hi: 0-99, Lo: 0-99 1 Reverb Density: 0-99, Diffusion: 0-99 2 High Frequency Roll O.
Advanced Applications - Chapter 6 Q20 Reference Manual 87 C HAPTER 6 A DVANCED A PPLICATIONS MIDI Functions The Q20 provides many MIDI functions, including being able to respond to program changes, sending and receiving Program information via SysEx dumps, and realtime control over various effect parameters via MIDI controllers.
Chapter 6 - Advanced Applications 88 Q20 Reference Manual Selecting Banks via MIDI You can use MIDI Controller 0 messages to select one of the three Program Banks (Preset, User 0 or User 1).
Advanced Applications - Chapter 6 Q20 Reference Manual 89 ➄ Turn the [VALUE/ENTER] knob to select a program change number from 000Ð127 to be re-mapped.
Chapter 6 - Advanced Applications 90 Q20 Reference Manual If sending a single Program, the display will not change when the [VALUE/ENTER] button is pressed, since this effectively takes no time at all. ➈ When you send a SysEx dump back to the Q20, it will automatically go into receive mode (you do not have to do anything special).
Advanced Applications - Chapter 6 Q20 Reference Manual 91 Realtime Modulation Functions You can use various MIDI messages (such as note number, velocity, aftertouch, or pitch-bend, etc.) to control parameters in the Q20, such as delay time, room size, etc.
Chapter 6 - Advanced Applications 92 Q20 Reference Manual Choosing a Target Once you have selected a Modulator, you must then select the Target to be modulated. The Target is broken down into two parts: first, you choose one of the active Blocks in the current Program, then you choose a parameter within the Block.
Advanced Applications - Chapter 6 Q20 Reference Manual 93 T yp e Effect Tar g et 4 Band Parametric EQ Lowpass Frequency, Lowpass Gain Low BP Frequency, Low BP Gain Low BP Bandwidth High BP Frequency, .
Chapter 6 - Advanced Applications 94 Q20 Reference Manual T yp e Effect Tar g et Reverberation M o n o R o o m Room 1 Hall 1 Plate 1 Chamber 1 Spring Input Hi Rolloff Predelay Time, Predelay Mix Decay.
Advanced Applications - Chapter 6 Q20 Reference Manual 95 Choosing a Source Once you have chosen a Modulator and a Target, it is time to select a Source.
Chapter 6 - Advanced Applications 96 Q20 Reference Manual Local Generators The Q20 is equipped with two Local Generators which can be used as Modulation Sources. Each Local Generator can be set to either one of five types: Input Envelope, Peak Follower, Ramp, LFO or Footswitch.
Advanced Applications - Chapter 6 Q20 Reference Manual 97 Ramp. The Ramp Local Generator is similar to the Envelope Generator, except that it doesnÕt have a release stage.
Chapter 6 - Advanced Applications 98 Q20 Reference Manual Editing the Local Generators To select the Input GeneratorsÕ types and edit their parameters: ➀ Press [MODULATION]. The [MODULATION] buttonÕs LED will light. ➁ Press [PAGE >] seven times (or until Modulation Page 4 is underlined).
Advanced Applications - Chapter 6 Q20 Reference Manual 99 Each Local GeneratorÕs pages differ from page 5. Each Local Generator typeÕs parameters are explaned in the chart below: Generator T yp e Pa.
Chapter 6 - Advanced Applications 100 Q20 Reference Manual Generator T yp e Pa g e Dis p la y Descri p tion Low Freq. Oscillator 5 LFO Cycle Time: 0.14- 35.14 Seconds This is the time it takes for the LFO to make one complete cycle Footswitch 5 Footswitch Source: Advance/Bypass This is the footswitch that is monitored for Modulation cues.
Advanced Applications - Chapter 6 Q20 Reference Manual 101 Footswitch Controls Two footswitch jacks, [ADVANCE] and [BYPASS], are provided on the back panel of the Q20. Program Advance The [ADVANCE] jack allows the Q20Õs Programs to be advanced remotely from a footswitch.
Chapter 6 - Advanced Applications 102 Q20 Reference Manual Block Bypass via MIDI It is possible to engage Block Bypass via MIDI controller messages which the Q20 receives at its MIDI IN connector.
Advanced Applications - Chapter 6 Q20 Reference Manual 103 MIDI Clock Control of Tap Tempo Delay If you are using a Program that uses either Tap Tempo Delay effects (Tap Tempo Mono Delay and/or Tap Tempo Ping Pong), you can control the delay time of the effect(s) via MIDI clock.
Chapter 6 - Advanced Applications 104 Q20 Reference Manual.
Digital Connections - Chapter 7 Q20 Reference Manual 105 CHAPTER 7 D IGITAL C ONNECTIONS Overview In addition to the analog inputs and outputs, the Q20 accepts and transmits audio on two digital protocols: ADAT Optical and S/PDIF. If your source and/or destination accept it, Ògoing digitalÓ is often the best way to connect the Q20.
Chapter 7 - Digital Connections 106 Q20 Reference Manual Digital Clock Synchronization Before talking about digital clocks, itÕs important to understand the Òone clock theoryÓ. This simply states that when you synchronize multiple machines (in this case digital audio recorders, processors, mixers, etc.
Digital Connections - Chapter 7 Q20 Reference Manual 107 Connections To a Single ADAT Connection between the Q20 and one or more ADATs is a simple task of creating a digital audio network that loops all the devices together. When using a single ADAT, simply connect two fiber optic cables between the devices to provide two- way communication.
Chapter 7 - Digital Connections 108 Q20 Reference Manual To Two or More ADATs If using two or more ADATs, they must be connected together so that they are in sync with each other. This is accomplished by connecting each ADATÕs SYNC OUT connector to the SYNC IN connector of the next ADAT in the chain, as described in the ADAT Reference Manual.
Digital Connections - Chapter 7 Q20 Reference Manual 109 To Two or More ADATs With a BRC or AI-2 If your ADAT system has an Alesis BRC Master Remote Controller, the fiber optic cables that make up the digital buss need to be connected in the same order as the Sync cables.
Chapter 7 - Digital Connections 110 Q20 Reference Manual ④ Press [<PAGE] until you reach Page 4. The display should read: INPUT AUDIO SOURCE: A NALOG DATA ⑤ Turn the [VALUE/ENTER] wheel to set the source to ÒS/PDIF DATAÓ.
Digital Connections - Chapter 7 Q20 Reference Manual 111 Routings To specific ADAT tracks To route the Q20Õs digital outputs to specific ADAT tracks depends on which of the 8 channels of the buss you use.
Chapter 7 - Digital Connections 112 Q20 Reference Manual From ADAT through the Q20 back to ADAT When routing ADAT tracks to the Q20 to be recorded back to ADAT, how you go about it depends on whether or not you are using a BRC.
Digital Connections - Chapter 7 Q20 Reference Manual 113 From a QuadraSynth or QS-series synth through the Q20 back to ADAT The QuadraSynth/QS7/QS8/etc. provide their four audio outputs (Main Left/Right and Aux Left/Right) on the first four channels of the Alesis Optical digital buss.
Chapter 7 - Digital Connections 114 Q20 Reference Manual.
Troubleshooting - Chapter 8 Q20 Reference Manual 115 C HAPTER 8 T ROUBLESHOOTING Troubleshooting Index If you are experience problems while operating the Q20, please use the following table to locate possible causes and solutions before contacting Alesis customer service for assistance.
Chapter 8 - Troubleshooting 116 Q20 Reference Manual Symptom Cause Solution Unit does not respond to front panel controls. Unknown software conflict, cosmic rays, boogieman/men or static electricity. Disconnect MIDI input. Power down and power up. If this doesn't work, try reinitialization, then total reset (see later in this chapter).
Troubleshooting - Chapter 8 Q20 Reference Manual 117 Error Messages Although the digital signal processing power in the Q20 is powerful and features plenty of memory, the programmability of the unit makes it possible to come across various error messages when exceeding its limitations.
Chapter 8 - Troubleshooting 118 Q20 Reference Manual Maintenance/Service Cleaning Disconnect the AC cord, then use a damp cloth to clean the Q20Õs metal and plastic surfaces. For heavy dirt, use a non-abrasive household cleaner such as Formula 409 or Fantastik.
Un point important après l'achat de l'appareil (ou même avant l'achat) est de lire le manuel d'utilisation. Nous devons le faire pour quelques raisons simples:
Si vous n'avez pas encore acheté Alesis Q20 c'est un bon moment pour vous familiariser avec les données de base sur le produit. Consulter d'abord les pages initiales du manuel d'utilisation, que vous trouverez ci-dessus. Vous devriez y trouver les données techniques les plus importants du Alesis Q20 - de cette manière, vous pouvez vérifier si l'équipement répond à vos besoins. Explorant les pages suivantes du manuel d'utilisation Alesis Q20, vous apprendrez toutes les caractéristiques du produit et des informations sur son fonctionnement. Les informations sur le Alesis Q20 va certainement vous aider à prendre une décision concernant l'achat.
Dans une situation où vous avez déjà le Alesis Q20, mais vous avez pas encore lu le manuel d'utilisation, vous devez le faire pour les raisons décrites ci-dessus,. Vous saurez alors si vous avez correctement utilisé les fonctions disponibles, et si vous avez commis des erreurs qui peuvent réduire la durée de vie du Alesis Q20.
Cependant, l'un des rôles les plus importants pour l'utilisateur joués par les manuels d'utilisateur est d'aider à résoudre les problèmes concernant le Alesis Q20. Presque toujours, vous y trouverez Troubleshooting, soit les pannes et les défaillances les plus fréquentes de l'apparei Alesis Q20 ainsi que les instructions sur la façon de les résoudre. Même si vous ne parvenez pas à résoudre le problème, le manuel d‘utilisation va vous montrer le chemin d'une nouvelle procédure – le contact avec le centre de service à la clientèle ou le service le plus proche.
