General MIDI

General MIDI/Waveblaster host

This module is a compact 6HP host for a General MDI sound module using the standard PC "Waveblaster" connector.

The module is specifically designed to use the “DreamBlaster Synth S2 General MIDI Daughterboard” from Serdaco BVBA. While this daughterboard is relatively costly, it provides access to a ready soldered and tested SAM2695 General MIDI IC in a very small outline PCB that will fit behind a 6HP Eurorack module. The SAM2695 is a 48 pin IC in a 6mmx6mm QFN package with 0.4mm pin spacing – fairly difficulty to solder by hand - hence the approach of using a ready made "waveblaster" module.

The SAM2695 IC produced by Dream SAS France is a single chip General MIDI implementation, including:
· MIDI control processor
· General MIDI wavetable implementation
· MIDI compatible Reverb, Chorus, Spatial effects, 4 band equaliser
· 64 voice (38 voice with effects)

· Stereo DAC DR: 86dB typ THD+N:-75dB typ

This Fitzgreyve Eurorack module provides a host for the Waveblaster PCB, and features:
· MIDI input TRS jack (“TRS-B”)
· MIDI Thru TRS jack (“TRS-B”)
· MIDI activity LED
· Left and right stereo outputs
· Volume control, to match audio output with varying programme content to Eurorack levels.
· Mainly through-hole construction (four capacitors and optional components are surface mount).

www.fitzgreyve.co.uk