Hi Larry, Re: stuck notes — not sure if this is your problem, but some MIDI devices will send a "note off" command when you let go of the key. Other devices simply send a "note on" command with a velocity of zero for this same situation.
Brian On Sat, Jan 14, 2023 at 2:01 PM Larry Taylor via Coreaudio-api < coreaudio-api@lists.apple.com> wrote: > I am developing a simple audio unit host, specifically for music devices > (soft synths).I have scoured the web and found many different examples, and > have a working program, in that I can select and load a music device, > display and manipulate the GUI, route MIDI data to it from an externally > keyboard, and hear output audio via the user-selected device. However, I > have a few issues that have me baffled at the moment, and any hints or > advice would be greatly appreciated. > > 1. Some devices will exhibit stuck notes, although many others are solid > with no stuck notes. I am doing minimal work on the real-time thread to > hand off MIDI events and nothing else that should impact any real-time > audio processing by the music device. Is there some process priority or > other setting I should be trying? > > 2. I have one older music device (specifically the Roland SOUND Canvas VA) > that works fine, except the level meters do not work. Am I missing a > callback or some sort of view refresh logic needed to make this work? > > 3. I have a few devices (one example is the Martinic AX73) that will load > fine and appear to respond to MIDI messages, but there is no output audio, > and no errors from any of the core audio API calls to indicate what might > be wrong. > > Thanks, > Larry > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Coreaudio-api mailing list (Coreaudio-api@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/coreaudio-api/brian%40262hz.com > > This email sent to br...@262hz.com >
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