Shruti-1 Specs

Thanks to the anon commenter who posted these specs for Shruti-1

I/O:

• mono audio output and input (input is sent to filter/VCA).
• MIDI in/out.
• 3 CV inputs (0-5V) on pin header.
• TX/RX/RST pins for onboard programming with an usb->serial chip.

Interface:

• 12 LEDs (current page / modulation matrix visualization).
• 2x16 LCD display.
• 5 switches to navigate through 12 parameter pages.
• 4 pots for patch editing (4 parameters per page).
• 2 inc/dec switches.

2 digital oscillators:

• Available for Osc1&Osc2:
• band limited wavetables: pulse, square (with pulse-width modulation), triangle with waveshapping, sawtooth.
• Available only for Osc1:
• sawtooth with sweepable resonance (casio cz-like).
• simplistic FM.
• lo-fi vowel synthesis (think “speak and spell”).
• cheap 8bit waveforms with plenty of aliasing.
• cheap square/PWM with even more aliasing.
• colored noise.
• 32 waveforms sweepable wavetable.
• “sweep” oscillator which scans through all the waveforms.
• Noise & sub-oscillator.

Modulation and filtering:

• CEM3379 filter.
• 2 LFO (square, sawtooth, triangle, sample & hold), syncable to tempo & MIDI clock.
• 2 ADSR envelopes.
• 16-steps step sequencer.
• 14 patchcords modulation matrix (16 modulation sources, 11 destinations). Modulation sources include MIDI controllers, pitch bend wheel and modulation, CV inputs, gater…

Performance:

• Arpeggiator with 15 different patterns + each of them with direction and octave setting.
• Support for (some) indian/arabic scales.
• “Patch performance” page in which 4 user-selectable parameters can be assigned to the 4 editing pots.

Others:

• MIDI implementation with patch load/save by SysEx, patch editing by NRP.
• Patch memory: 16 patches."