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SIDCog v1.3 produces C64 sound on Propeller

Posted on Friday, June 28th, 2013 in code, Parallax Propeller, vintage by the machinegeek

propellerchip
Johannes Ahlebrand has released version 1.3 of SIDCog. This Spin language object emulates the famous sound chip in the Commodore 64 running in a single Propeller cog. The developer reports it’s much closer to the 8580 than the 6581 when it comes to filter emulation and combined waveforms. Features include a 31kHz sample rate, >16bit internal resolution and includes full filter support (any combination of Lowpass, Bandpass and Highpass filter) and full envelope support with a logarithmic release/decay curve (uses the same logarithmic approximation as a real SID). Square, Saw, Triangle and Noise waveforme are supported.

For more information and to download the object visit the SIDCog page at the Propeller Object Exchange,

This entry was posted on Friday, June 28th, 2013 at 3:40 pm and is filed under code, Parallax Propeller, vintage. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

One Response to “SIDCog v1.3 produces C64 sound on Propeller”

  1. Johannes Ahlebrand says:

    I just want to correct one inaccuracy. SIDcog is not written in Spin. The emulation itshelf is pure assembler with just a thin API written in Spin for those that do not like to “bit bang” the SID registers.

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