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<body><p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> I raised a query on the Fluidsynth list, and they suggested trying with </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> the command-line</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> version of fluidsynth. I tried that and it responded as it should - </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> which suggests the</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> problem is in the Calf Gui. I guess I should raise it with the Calf list </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> (if I can find it.)</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> I assume that LV2 uses either Alsa or Jack to communicate, but I've not </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> used LV2 at all.</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> Certainly Fluidsynth, and hence Calf, is quite happy using Jack. I don't </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> know about the</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> other Calf plugins, as I've never used any, other than the synth.</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">I think I found the cause, LV2 version indeed is fine... it's a change in calfjackhost done in 2018:</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><a href="https://github.com/calf-studio-gear/calf/commit/1b37e753876fdd104a906aed1e712ff28ec4611f#diff-3fc4abf5e55f800decb309a734fcd5b32b519c7a3a8e8c7b973759593bf67009">https://github.com/calf-studio-gear/calf/commit/1b37e753876fdd104a906aed1e712ff28ec4611f#diff-3fc4abf5e55f800decb309a734fcd5b32b519c7a3a8e8c7b973759593bf67009</a></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">To me it looks that this commit is just plain wrong in raising the channel number by one.</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">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...</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">So I changed line 197 in jackhost.cpp from:</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> int channel = (buffer[0] & 0x0f) + 1;</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">to read:</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"> int channel = (buffer[0] & 0x0f);</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">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.</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">(tried with Mamba virtual keyboard on my laptop, which also displays channels as 1 - 16)</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> Bill</p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;">> </p>
<p style="margin-top:0;margin-bottom:0;margin-left:0;margin-right:0;"><br /></p>
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