MATRIXSYNTH: VS1103b MIDI Synthesizer v3


Monday, October 08, 2012

VS1103b MIDI Synthesizer v3


Published on Oct 8, 2012 by HarryMatic
Channel moved to Harry Axten

"The last version of my VS1103b MIDI synthesizer. I have designed nice front and back panels which are made of laser-cut plastic. I have also gotten rid of the noisy volume control and the MIDI thru, instead adding separate left and right audio outputs. Schematics, stripboard layout, more photos and a full writeup can be found at : http://www.instructables.com/id/E82VEK1GXUZ7YJA/"

Follow-up to this post.

"The VS1103b, manufactured by VSLI Technology, is a single-chip MIDI/ADPCM/WAV audio decoder and ADPCM encoder that can handle upto three simultaneous audio streams. It can also act as a MIDI synthesizer.

It is this MIDI synthesizer capability that we are interested in. Make no mistake - the quality of the MIDI voices isn't stunning, but it has a charm to it that reminds me of the FM synthesis found on old Soundblaster cards of yesteryear. The VS1103b MIDI synthesizer mode conforms to the General MIDI standard - 15 melodic channels and 1 percussion channel.

The only problem with this chip however is that it is a very small 48 pin surface-mount package. Fortunately, SparkFun make a break-out board for this chip that has a 20 pin DIP package - much more suitable for DIY electronics."

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