[sdiy] Anybody using Atmel AVR?

[Jaroslaw Ziembicki]

> > I built a MIDI synth module based on a AT90S8535 (2xDCO + 1st order
DCF).

> Do you have a webpage, audio examples, etc?

No, I have no webpage. The sound of the module is nothing special; but
what else can you expect from a two oscillator synth with a 1st order LPF?
I tried to be innovative about sound controlling; for example the LFO can
generate a regular square, a random square ("sample and hold" principle),
a regular triangle, and a "random triangle" (my own invention).

By the way, my another ATmega project (from October) was a "virtual analog
drum simulator", where two sine wave oscillators and noise were used to
synthesize
a drum sound (bass, snare, tom-tom, etc.). Both sine oscillators have an AD
type
loudness envelope, the noise has also one plus a simple 1st order LPF, a
third AD
envelope controls the pitch of the sine waves ("bending"). It all runs on an
ATmega8.
The micro even does the digital-to-analog audio conversion! Two PWM outputs
and two resistors make a 16-bit DAC!
There are 6 pots and 2 or 3 switches for sound parameters' setting.
And a broad spectrum of really nice sounds can be synthesized!
Unfortunately, I don't use percussive sounds in my music, so I didn't
finalize that
project - no MIDI input, no enclosure, etc...

Regards, Jarek