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Mutable Instruments Shruti-1 Nieuwe 8-bit Synth

http://mutable-instruments.net/shruti1


attachment.php


Specifications

Digital oscillators

Available for all oscillators, and band-limited

•impulse train (high-pass filtered square wave) with pulse-width modulation
•square with pulse-width modulation
•triangle with waveshapping
•sawtooth with waveshapping

Available for oscillator 1 only

•sawtooth with sweepable resonance (casio cz-like). This creates a resonance directly in the oscillator output, without using the filter
•simplistic FM (1>2 configuration), with adjustable modulation index and frequency ratio
•8bit-like harsh waveforms with wavetable scan
•poor man’s square with pulse-width modulation (plenty of aliasing but fat for basses)
•colored noise (sweep from low-pass filtered white noise -> white noise -> high-pass filtered white noise)
•lo-fi vowel synthesis (think “speak and spell”) with vowel morphing
•wavetable (32 waveforms) with wave morphing. Waveforms were extracted from organ/digital piano sounds
•“sweep” oscillator which scans through all the band-limited waveforms

Mixer

•adjustable oscillator balance
•mixing algorithms: simple sum, simple sum with synchronization, ring modulator, xor modulator
•extra sources: noise & sub-oscillator (triangle or square)

Filter

•CEM3379 analog VCF/VCA, with external audio input
Modulation
•LFOs: 2, with square, sawtooth, triangle, sample & hold shapes. Syncable to tempo
•envelopes 2 ADSR
•modulation matrix: up to 14 source -> destination connections. Adjustable modulation amount in the -100% — 100% range
•modulation sources:

◦LFO 1/2
◦step sequencer
◦arpeggiator gate
◦mod. wheel
◦pitch bender
◦DC offset
◦CV inputs 1/2/3
◦noise generator
◦ENV 1/2
◦note velocity
◦note number (eg for filter tracking)
◦keyboard gate

•modulation destinations:

◦filter cutoff
◦VCA gain
◦pulse width/Parameter osc. 1/2
◦pitch osc. 1/2
◦vibrato (fine pitch, applied to osc 1 & 2 simultaneously)
◦oscillator balance
◦noise level
◦subosc level
◦resonance

Performance

•step sequencer: 16-steps (4-bits value per step). Adjustable cycle length
•arpeggiator: 15 rhythmic patterns, each of them with up/down/up&down/random variants. 1-4 octave range
•clock: internal, 40-240 BPM with swing, or external (MIDI)
•tuning: alternative tuning schemes/keyboard mappings: pythagorean scale, just temperament, 1/4 tone on E/A/B, Melakarta ragas
•“patch performance”: custom page in which 4 user-selectable parameters can be assigned to the 4 editing pots

System and memory

•MIDI implementation: notes, controllers, clock synchronization, patch editing by NRP, individual patch load/save by SysEx
•patch memory: 16-patches stored in EEPROM
•easter egg
•firmware update by SysEx

Hardware and connectors

•power: 2.1mm connector, requires 7.5V-9V 300mA supply (can be unregulated). Center pin positive (+), outer collar negative (-)
•audio input/output: 6.35 Jack (Mono audio out), 6.35 Jack (External signal in)
•cv inputs: 3 CV inputs (0-+5 V, labelled “HACK_ME!” on the PCB) for easy experimentation with controllers, accessible through pin header on the motherboard
•MIDI: in, out (logical thru + patch dumps)
•serial: tx/rx/reset pins for interfacing with an usb->serial chip, for on-chip firmware development
•controllers:
◦12 facade LEDs (current page / modulation matrix visualization)
◦backlit 2×16 LCD display
◦4 pots for patch editing
◦volume and input gain pot
◦5 navigation switches, one inc/dec switches pair
 

Attachments

  • shruti1_big.jpg
    shruti1_big.jpg
    214,1 KB · Bekeken: 41

bazziman

Ouwe rot
Lid sinds
11 juli 2002
Berichten
1.519
Locatie
Rotterdam
al die dingen die jij opnoemt die je zou moeten kopen moet je alleen kopen als je het in hardware moet zijn... maar aangezien we het hebben over freubel 8 bit sounds kan dat net zo goed in een VSTi... zoiets valt zeker te bouwen als een stukkie software... maar goed, jij wil alleen hardware nutuulk...
Tja....knoppies en lampies he?
 

dj_bomber

Analog @##0# (error)
Lid sinds
27 december 2003
Berichten
962
Locatie
Tussen de polyfone zaagorgels
Ga de shruthi-1 polivoks en sidekick 3379 bouwen. Is er hier nog animo voor de 3379 boards dan bestel ik er een paar extra mee voor de geinteresseerden? Ze kunnen nml. ook worden voorzien van 3389's. Pb maar ff bij interesse.

Hier een audio test door Olivier van de CEM3379 vs CEM3389:

Here it is, CEM3379 panned to the left, CEM3389 panned to the right:
http://dl.dropbox.com/u/612135/cem33x9.wav
 

teluur

Te|
Lid sinds
9 december 2005
Berichten
4.098
Lichtelijk off-topic De MIDIPal van Mutable Instruments heeft een aantal handige/creative functies en is ook nog eens heel redelijk geprijst, alleen jammer dat in de kit
The microcontroller chip sold in the kit is blank. An AVR programmer is needed for flashing it!
 
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