<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> </head> <body> <div class="moz-cite-prefix">On 06/02/2021 11:19, Edgar Aichinger wrote: </div> <blockquote type="cite" cite="mid:1772067.CepufGn3Ml@asus"> <meta http-equiv="content-type" content="text/html; charset=windows-1252"> > I raised a query on the Fluidsynth list, and they suggested trying with > the command-line > version of fluidsynth. I tried that and it responded as it should - > which suggests the > problem is in the Calf Gui. I guess I should raise it with the Calf list > (if I can find it.) > > I assume that LV2 uses either Alsa or Jack to communicate, but I've not > used LV2 at all. > Certainly Fluidsynth, and hence Calf, is quite happy using Jack. I don't > know about the > other Calf plugins, as I've never used any, other than the synth. I think I found the cause, LV2 version indeed is fine... it's a change in calfjackhost done in 2018: <a href="https://github.com/calf-studio-gear/calf/commit/1b37e753876fdd104a906aed1e712ff28ec4611f#diff-3fc4abf5e55f800decb309a734fcd5b32b519c7a3a8e8c7b973759593bf67009" moz-do-not-send="true">https://github.com/calf-studio-gear/calf/commit/1b37e753876fdd104a906aed1e712ff28ec4611f#diff-3fc4abf5e55f800decb309a734fcd5b32b519c7a3a8e8c7b973759593bf67009</a> To me it looks that this commit is just plain wrong in raising the channel number by one. The intent (see issue #97 referenced in this commit msg) is to compensate the offset seen in calf monosynth and other synths, but apparently this change simply increases the input buffer channel by one... So I changed line 197 in jackhost.cpp from: int channel = (buffer[0] & 0x0f) + 1; to read: int channel = (buffer[0] & 0x0f); and this fixes the off by one error in fluidsynth, and it seems the other synths still respond on correct channels, even if displaying 0-15 in their MIDI channel selectors. (tried with Mamba virtual keyboard on my laptop, which also displays channels as 1 - 16) </blockquote> Fine, I trust that will percolate through. For the moment I can live with it, I'd rather not get into recompiling Calf, got enough on my plate... Bill <pre class="moz-signature" cols="72">-- +----------------------------------------+ | Bill Purvis | | email: <a class="moz-txt-link-abbreviated" href="mailto:bill@billp.org">bill@billp.org</a> | +----------------------------------------+</pre> </body> </html>