David Horvath has put together a front end to the bristol emulations. It is written in C# using Mono and GTK:

Gui for Bristol Synthesiser. Bristol is an emulation package for a number of different 'classic' synthesisers including additive and subtractive and a few organs. System requirements: Linux operating system, Bristol, Mono (with GTK#.

The application can be found on the following sites:

http://www.dacr.hu/monobristol
http://sourceforge.net/projects/monobristol/

Release Notes for this version:

2009.06.02. monoBristol 0.40-3.
-Realistic MG-1
-Moog Sonic6
-Parameters: detune, pitch wheel depth, velocity, glide duration
 
2009.05.29. monoBristol 0.40-1.
-first release

Kind regards, Nick.

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