http://mutable-instruments.net/shruti1
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
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
Hoe heb jij er dan een kunnen bestellen?
een oude mirage op de kop tikken lijkt me ondoenlijk: groot ding, oude technologie, debiel operating system....en nog relatief duur ook. Toch zou ik wel dat mooie oude geluid willen hebbeb. Nu je met arduino (achtige) systemen mooie synts kan bouwen komt een moderne mirage dichterbij. Maar dan wel met een paar draaiknoppen, usb / sd, full midi en in een hanid doosje....als je voor 250 een shruti-1 kan krijgen - stel je voor dat er een sd readertje in zit en een halve meg aan ram....met wat creatieve (denk machinedrum) achtige manieren om je samples te tweaken....dat is toch gewoon gaaf? Ik zie niet in wat dat met c64 achtige blokgolven te maken heeft....
