Drawbar organ sim. - progress so far.
mrainbow1
Posts: 9
Thought I'd post my efforts so far of my drawbar organ simulator (Hammond? - I wish!) and ask if anyone can help me with some problems. I've written the code in Propbasic which would be available to anyone who could help me with the problems.
As mentioned in a previous thread (H.Bollig's Hammond B3) I am developing something similar (pic attached). Attaching a couple of sound clips of the board - straight out of the Prop and into my PC sound card. They show normal, slow, and fast Leslie as well as a clip and short propbasic code of a problem I'm having with key clicks. Also you will notice artefact and noise on the Leslie simulations. I have decided I may just use the Prop to generate the normal tones and use a PT2399 or MN3207 to simulate the Leslie because I haven't been able to clean up the delay Leslie signal which, when the Leslie cog is running, seems to affect the normal channel with noise as well.
Basic specs are: 5 octave, 12 note polyphony, 22.075KHz sample rate, 16 bit, Normal/Slow/Fast Leslie(Chorus), percussion, sustain.
This is all controlled by 7 buttons on the board and display is a 16 x 2 LCD (5v unit, but I've used a simple level shifting cct of 6x diodes and resistors).
Would be very grateful for any feedback.
Mike Rainbow
As mentioned in a previous thread (H.Bollig's Hammond B3) I am developing something similar (pic attached). Attaching a couple of sound clips of the board - straight out of the Prop and into my PC sound card. They show normal, slow, and fast Leslie as well as a clip and short propbasic code of a problem I'm having with key clicks. Also you will notice artefact and noise on the Leslie simulations. I have decided I may just use the Prop to generate the normal tones and use a PT2399 or MN3207 to simulate the Leslie because I haven't been able to clean up the delay Leslie signal which, when the Leslie cog is running, seems to affect the normal channel with noise as well.
Basic specs are: 5 octave, 12 note polyphony, 22.075KHz sample rate, 16 bit, Normal/Slow/Fast Leslie(Chorus), percussion, sustain.
This is all controlled by 7 buttons on the board and display is a 16 x 2 LCD (5v unit, but I've used a simple level shifting cct of 6x diodes and resistors).
Would be very grateful for any feedback.
Mike Rainbow
Comments
I have not had a chance to listen to the clips, but generating audio on the prop can be a bit tricky. My guess is with the Leslie running, audio is output from cog 6 or 7. This causes problems since the clock is in close proximity? Try changing the cog order a bit maybe?
*edit*
Just checked the examples and it sounds like clock noise is the culprit. Try changing the audio output cog to 0. As for the click?
Just checked the examples and it sounds like clock noise is the culprit. Try changing the audio output cog to 0. As for the click?[/QUOTE]
Thanks very much - I will try this.
Mike R