Dave Smith Instruments TETR4 Dokumentacja

Operation Manual

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5 Front Panel Controls Select — Use SELECT to change and scroll through programs and combos. When ASSIGN PARAMS is on, SELECT changes the value of t

6 Write — Use WRITE to save an edited program or combo to any of Tetra’s memory locations. To execute the write operation, press the increment (+) bu

7 Alternately, with ASSIGN PARAMETERS on, choose a parameter to edit with any of the ASSIGNABLE PARAMETERS controls, and change the parameter’s value

9 Basic Operation Tetra has multiple personalities. It is a four-voice, analog poly synth, a sort of “mini Prophet.” But the voice architecture is ba

10 Combos When in Program Mode, press the Mode switch to enter Combo Mode. Combos are combinations of four programs, one for each voice. In Combo Mod

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13 Global Parameters Tetra’s Global parameters affect all programs globally. Examples include MIDI channel and fine tune. To edit the Global paramete

14 MIDI SysEx: Off, On — When On, the synth will respond to received MIDI SysEx messages, and will transmit them, when prompted, to the MIDI Out. See

15 Note: Outputs 3 and 4 are noticeably louder than the other two outputs. This is normal. Outputs 3 and 4 are always monophonic and, therefore, do n

16 Reset Globals — Tetra does not have a full hardware reset, but select this parameter and press WRITE to reset the global parameters to their facto

17 Program Parameters All Program parameters can be edited using any of ASSIGNABLE PARAMETERS controls. To assign a parameter to a control, press the

18 Display Waveshape Osc Off No output Sawtooth Sawtooth Triangle Triangle Saw-Tri Sawtooth — Triangle mix Pulse xx Pulse Wave, with pulse width ran

19 accurate sounds, and allows precise de-tuning. The Oscillator Slop parameter allows subtle amounts of frequency drift. For larger amounts, use a r

20 Audio Mod: 0...127 — Controls the amount of audio from Oscillator 1 used to modulate the filter cutoff frequency. For filter-only audio, set OSCI

21 Decay: 0…127 — Sets the Decay time. Sustain: 0…127 — Sets the Sustain level. Release: 0…127 — Sets the Release time. Pan Spread: 0…127 — There is

22 Display Timing Sync 3 Steps Sequence speed divided by 3 2 Steps Sequence speed divided by 2 1.5 Step Sequence speed divided by 1.5 1 Step One cyc

23 Env Delay: 0…127 — Sets a delay between the time Envelope 3 is triggered and when the Attack portion actually begins. Env Attack: 0…127 — Sets the

Tetra Operation Manual Version 1.3 September 2010 Dave Smith Instruments 1210 Cabrillo Hwy N Half Moon Bay, CA 94019-1449 US

24 Mod Wheel Destination — Selects the destination to which the mod wheel is routed. See Modulation Destinations on page 39 for a list of possible de

25 Unison Assign: see table — Determines how Tetra responds to keyed notes when unison is on. Display Key mode Low Note Low note priority LowRetrig

26 For Stack, both layers respond to MIDI notes for the entire key range, enabling two patches to be played simultaneously with a single key stroke.

27 Mode: see table — Sets the order in which the arpeggiator plays notes. Mode Behavior Up Plays from lowest to highest note. Down Plays from highes

28 Display Trigger mode Key Step Striking a key advances the sequencer one step. On/Off: Off, On — Turns the sequencer on and off. Seq 1, 2, 3, or

29 For the most part, the sequence destinations are the same as the modulation destinations, which is appropriate: a sequence is just another modulat

30 Sequences do not have to be the same length, however, which makes for some very interesting, less repetitive patterns, particularly when sequences

31 three routed to filter resonance, and sequence four routed to amplifier envelope amount for accents. Many of the factory programs have sequences p

32 oscillator frequency to glide from the step three value when step four is gated on. The higher the Slew value, the slower the slew rate. And the s

33 Combos A combo is a collection of four programs—one per voice—combined to make a sort of super program. How a combo responds to MIDI note data dep

Tested To ComplyWith FCC StandardsFOR OFFICE USE This device complies with Part 15 of the FCC Rules. Operation is subject to the following two

34 The top row shows the current combo, the program, the bank, and the voice being edited. The bottom row shows the program name. Note: Though the o

35 voices 2 through 4), the combo will play back polyphonically. If the PUSH IT button is to be used to latch notes on, Push It Mode must be set to T

36 Using Poly Chain Poly Chain enables multiple Tetras to be chained together for increased polyphony, up to 16 voices. MIDI note data from a keyboar

37 Also, Mopho’s INPUT GAIN (similar to Tetra’s FEEDBACK GAIN) is not programmable, so it may take some tweaking to get feedback to sound the same on

38 Various Poly Chain Configurations UsingTetra, Mopho, and the Prophet ’08**If Out 4 and Out 8 do not appear as poly chain options on the Prophet, c

39 Using USB Tetra’s USB 2.0 port enables bidirectional MIDI communication with a computer. A MIDI interface and MIDI cables are not necessary, just

40 Windows Vista essentially behaves the same as XP, but the device name is DSI Tetra rather than USB Audio Device. In Windows, if you unplug the USB

41 Modulation Destinations Display Destination Off No destination selected Osc 1 Freq Oscillator 1 Frequency Osc 2 Freq Oscillator 2 Frequency OscAl

42 Env3Releas Envelope 3 Release Rate EnvAll Rel All Envelope Release Rates Mod 1 Amt Modulator 1 Amount Mod 2 Amt Modulator 2 Amount Mod 3 Amt Modul

43 Modulation Sources Display Source Off No source selected Sequence1 Sequence 1 Sequence2 Sequence 2 Sequence3 Sequence 3 Sequence4 Sequence 4 LFO

Contents Quick Start... 1 Getting Connected ...

44 Parameter List Osc 1 Frequency Osc 1 Fine Freq Oscillator 1 Shape Oscillator 1 Glide Osc 1 Key Track Sub Osc 1 Level Osc 2 Frequency Osc 2 Fine Fr

45 Support Troubleshooting Here are a few suggestions for resolving problems that may occur. The sequencer has stopped running. Make sure Clock in th

46 contacting Technical Support. It’s probably the first thing they’ll ask you to do. Warranty Repair Dave Smith Instruments warrants that Tetra will

47 MIDI Implementation Tetra receives MIDI data according to the mode controls under GLOBAL. In addition, there is interaction between some of the pr

48 Received Channel Messages Status Second Third Description 1000 nnnn 0kkkkkkk 0vvvvvvv Note Off. Velocity is ignored 1001 nnnn 0kkkkkkk 0v

49 Transmitted Controller Messages Status Second Third Description 1011 nnnn 0000 0111 0vvvvvvv Volume knob 1011 nnnn 0010 0000 0vvvvvvv Ba

50 NRPN Messages The Non-Registered Parameter Number (NRPN) MIDI messages are used to transmit and receive both global and program parameters. They

51 Received NRPN Messages Status Second Third Description 1011 nnnn 0110 0011 0vvvvvvv NRPN parameter number MSB CC 1011 nnnn 0110 0010 0vvv

52 391 0 - 3 Parameter Receive†: 0 All 1 NRPN only 2 CC only 3 Off 394 0 - 1 MIDI Controller Send/Receive Off/On 395 0 - 1 MIDI Sysex Send

53 4 4 204 0 - 1 Oscillator 1 Keyboard Off/On 6 5 205 0 – 120 Oscillator 2 Frequency, 0 – 120 in semitones (10 octave range) 7 6 206 0 – 1

Support...45 MIDI Implementation ...

54 42 37 237 0 - 166 LFO 1 Frequency; 0 – 150 unsynced frequencies 151 Sequence speed divided by 32 152 Sequence speed divided by 16 153 Seq

55 66 61 261 0 - 127 Envelope 3 Attack 67 62 262 0 - 127 Envelope 3 Decay 68 63 263 0 - 127 Envelope 3 Sustain 69 64 264 0 - 127 Enve

56 101 91 291 30 - 250 BPM tempo 102 92 292 0 - 12 Clock Divide: Half Note Quarter Note Eighth Note Eighth Note half swing Eighth Note ful

57 104 100 300 0 - 1 Arpeggiator; off/on 106 101 301 0 - 1 Gated Sequencer; off/on 111 105 X 0 - 183 Assignable Parameter 1 112 106 X

58 The following tables list the values used with the program parameters to specify modulation destinations and sources. Mod Destinations Value Of

59 Note: In Multi Mode, the regular, program NRPNs are received and transmitted for each of the four voices on their separate MIDI channels. Quad NRP

60 34 VCA ENV VEL AMT 543 799 1055 1311 1567 35 VCA DEL 544 800 1056 1312 1568 36 VCA ATT 545 801 1057 1313 1569 37 VCA DEC 546

61 77 MOD SOURCE 3 583 839 1095 1351 1607 78 MOD AMT 3 584 840 1096 1352 1608 79 MOD DEST 3 585 841 1097 1353 1609 80 MOD SOURCE 4

62 114 PARAM ENC SEL V4 620 X X X X 19 FEEDBACK GAIN 622 878 1134 1390 1646 96 PUSH IT NOTE 623 879 1135 1391 1647 97

63 0vvv vvvv If MIDI Channel = ALL, 0vvvvvvv = 0111 1111. Otherwise 0vvvvvvv = Channel Number 0-15. 0000 0110 Inquiry Message 0000 0010 Inquiry R

1 Quick Start Thanks for purchasing your Tetra synthesizer! Listen to the sounds, twiddle some knobs, have some fun! Please Register! Please go to ww

64 Request Global Parameter Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0000 1110 Reques

65 Program Data Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0000 0010 Program Data 0000 0

66 Combo Edit Buffer Data Dump Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0011 0111 Edit Buf

67 Mode Change: Combo Mode Status Description 1111 0000 System Exclusive (SysEx) 0000 0001 DSI ID 0010 0110 Tetra ID 0011 0001 Select Combo M

68 Hidden Functions Hold the ASSIGN PARAMETERS switch and hit the Mode switch to calibrate the low-pass filter and analog oscillator waveshapes. Th

Dave Smith Instruments 1210 Cabrillo Hwy N Half Moon Bay, CA 94019-1449 USA www.DaveSmithInstruments.com

2 decrement change the values. These settings are remembered when the synth is turned off. Summary You should be up and running now; for more operati

3 Getting Connected Tetra has several inputs and outputs on its back panel. Power Input — Connect the power supply included with your Tetra. The powe