Sunday, March 03, 2013

A26F: Custom Waveform and Three Voice Polyphony

video

The Atari 2600 sound chip is limited to two programmable voices, each with a selection of pre-defined waveforms.

This is a demonstration of a custom waveform channel that can be used - to some degree - to overcome some of the limitations imposed on the Atari 2600 sound chip. The custom waveform is user-defineable and can be changed during runtime.

The custom waveform also allows for a much wider range of frequencies. Additionally, the custom waveform can be used at the same time as the main two oscillators, thereby - with some clever sequencing - giving rise to three-voice polyphony.

This feature will be included in the next A26F firmware update.

2 comments:

kylyn o said...

I hope there will be an update. The A26F is far far better than the synthcart. Imagining what I could do with this has had me hopeful for years.

Sebastian Tomczak said...

Hi there,
I'm keen to release the update, I didn't realise people were still interested.

Stay tuned!

Cheers,

- Seb