Forums > MaxMSP

synthesizer troubles

April 29, 2008 | 9:17 pm

I just discovered max for myself last week and I’m incredibly excited about it. I’m working my way through the tutorials but I’ve been having a pressing issue that I haven’t seen covered yet

i’m using a midi keyboard to control my mac’s internal AU DLS synth. the keys work fine but when I use a continuous input like a fader to control the pitch, the sound craps out occasionally. Max still recognizes the input, but nothing comes through the speakers.

Am i overloading something? should I put a metronome somewhere? or is it just a deficiency of my soundcard or the internal synthesizer?

thanks a lot


April 29, 2008 | 10:08 pm

Quote: Hobbes Auburndale wrote on Tue, 29 April 2008 14:17
—————————————————-
> when I use a continuous input like a fader to control the pitch, the sound craps out occasionally. Max still recognizes the input, but nothing comes through the speakers.
>

Hi,
You should post your patch so people can help figure out why it isn’t working. (Assuming you are using Max 5: select all, go to edit -> copy compressed, and then paste here.)

From your description I’m guessing that you may not be sending note offs. If you send too many note ons without any note offs, the synth will get overloaded and stop playing because it can only handle so much polyphony.

If that’s your problem, [makenote] is one way you could fix it. [speedlim] may also be helpful. Take a look at this patch (copy and paste this into Max 5):

– Pasted Max Patch, click to expand. –

April 29, 2008 | 10:09 pm

On Apr 29, 2008, at 2:17 PM, ted wrote:
> i’m using a midi keyboard to control my mac’s internal AU DLS synth.
> the keys work fine but when I use a continuous input like a fader to
> control the pitch, the sound craps out occasionally. Max still
> recognizes the input, but nothing comes through the speakers.

I’ve found the internal DLS synth to be sort of fragile. I don’t know
whether it’s an Apple problem or a Cycling ’74 problem. It’s been this
way for quite a while.

I don’t have any idea of why, but in my experience it seems that MIDI
channel 1 goes away. You might try redirecting your keyboard stream to
channel 2.

At any rate, a speedlim might help, by thinning the data.

Chris Muir
cbm@well.com

http://www.xfade.com


April 29, 2008 | 10:18 pm

Also, you may want to run your keyboard’s MIDI stream through Borax
(if you want to gather statistics about what’s going on), or flush.

Both these objects will send note-offs for any note sounding.

Chris Muir
cbm@well.com

http://www.xfade.com


April 29, 2008 | 11:00 pm

thats it! note offs were the problem.

im reading about borax, flush and speedlim. i hadnt encountered thouse. I should have known makenote though

thankyou both so much. i realize that wasnt a very stimulating puzzle


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