On Thu, May 12, 2016 12:02 pm, aledez0 wrote: You changed the jack ini file, or the jackrouter ini file? I don't use jack on Windows, but my understanding is that there is an additional component known as jackrouter present when you need to connect applications such as ProTools which do not have native jack support, and that component presents an ASIO interface to the windows applications, and a jack client interface to the jack server. My guess (again, not using jack on windows myself) is that both jackrouter and jack server would need to be configured for a higher port count. If you are using the instructions here: http://www.jackaudio.org/faq/jack_on_windows.html The change in the parameters passed to jack server to increase port count would be in this step on that page: Add the following information to the ‘Target’ property: "C:\Program Files\Jack\jackd.exe" -R -S -d portaudio -d "ASIO::ASIO4ALL v2" I don't see a port count defined there, and I'm not sure how jack on windows defines the default number of ports, but you could for example add -p 64 between the "-S" and the "-d portaudio" arguments. Order is important, because the arguments before the driver are for jack server itself, arguments after the driver name (port audio and ASIO) are for the driver, not the server. It would probably be good to run that exact command line copied and pasted into a cmd window to make sure there are no errors or warnings reported, if you start that from a desktop shortcut and there is an error, the window will close before you get a chance to read the error message. After that is working you can change the IO count in the jackrouter.ini file to match the 64 port count. Actually, 64 for the jack server would include however many connections you want from ProTools plus your sound card connections, so depending on how many connections you want to make from ProTools simultaneously you may need a few more in the jackd configuration than in the jackrouter configuration. There seem to be relatively few Windows users on the jack development mailing list, you may have better luck finding someone who knows for sure on the Harrison forums. -- Chris Caudle

On Thu, May 12, 2016 5:19 pm, aledez0 wrote: Seems unlikely that Pro Tools is limited to 32 channels. Mixbus uses jack directly, Pro Tools has to use jackrouter. Did you read and understand my previous message about the distinction between jack (jack server) and jackrouter (driver which provides ASIO interface to Windows apps, and jack ports to jack server)? That extra layer complicates matters and makes determining where the problem is occuring more difficult. How do you start jackd.exe? The desktop shortcut described on the jackaudio.org web page I reference earlier? Or some kind of graphical program that lets you select parameters then start jackd.exe like QJackControl? Depending on the answer to that question, it should be possible to direct you to the place where startup messages are emitted by the jack server, and you can verify how many ports are created. I'm not really familiar with jackrouter, so again, the Harrison forums might lead you to people who are more knowledgeable about the Windows specific quirks. -- Chris Caudle

On 12/05/2016 22:04, Chris Caudle wrote: In case it helps, this is what I see in my .jackdrc file (on Windows):- C:\Program Files\Jack\jackd.exe -S -p 512 -T -d portaudio -r 48000 -p 1024 -P "ASIO::ASIO4ALL v2" -C "ASIO::ASIO4ALL v2" Notice that there are two parameters with the designation "-p". IIRC the first one is the number of ports and the second one is the buffer size. This might also be relevant (from Jack's README file):- ============================================= JackRouter JACK/ASIO driver ============================================= A "JackRouter.ini" configuration file allows the application to configure how the JackRouter driver behaves. - [IO]: - input/output : the application can obtain any number [of] JACK input/output ports (not necessarily equal to the audio card input/output number). [Note that some applications force their input/output channel number]. John