cozyMIDI - new app that plays std midi files (68k)

[Mu0n]

cozyMIDI:​

my brand new 68k mac application coded in C (and sweat). Plays standard MIDI files assuming you have an external module plugged on the modem port.

• loads and plays type 0 (1 track) and type 1 (more than 1 track) standard MIDI files
• keeps them in a pre-calculated form so the loop doesn't have to do real time divisions at the cost of slightly longer file opening delays
• animations with small graphic zones using CopyBits and 32 pixel width to keep it lean different MIDI instrument out of the 128 regular general MIDI instruments
  
  Mac Garden link: https://macintoshgarden.org/apps/cozymidi
  Github link: https://github.com/Mu0n/1bitdreammachine/tree/main/cozyMIDI
  
  
  this is a project that continues in the path I took over the last 2 years about MIDI and vintage computers for several platforms. Here's a previous thread here where I got some great help. Thanks to all involved!
  
  

  Post in thread 'Programmatically (in C) send MIDI out signal from modem port, SE/30'

  Aug 12, 2025

  Wow guys, thanks for the high quality tutorial on variable types. I found very old documentation in which SerGetBuf uses ints instead of longs, maybe that was triggered the error for me. It's definitely a long in more recent documentation, including THINK Reference Viewer.
  
  The bad formatter character for printf was a stupid mistake that I do occasionally.
  The real mistake was not setting up the .AIn driver properly with the clock like I did for .AOut. There was no chance of getting anything other than garbage before this was done. Once this was fixed with the printf statement, I saw the...

  • Mu0n

 

[esselfortium]

I absolutely love this. The visuals add so much.

 

[adespoton]

Thanks for taking this one to the finish line, @Mu0n ! Brings back memories of using DMCS, a Mac Plus and a Korg! That setup (I suspect due to DMCS) tended to bottom out with more than four voices though.

Will it also work with QT Midi if it's present?

 

[Mu0n]

Thanks for taking this one to the finish line, @Mu0n ! Brings back memories of using DMCS, a Mac Plus and a Korg! That setup (I suspect due to DMCS) tended to bottom out with more than four voices though.

Will it also work with QT Midi if it's present?

Good question.
The only mac I have that could test this is this G3 with OS9.
My code attempts to reconfigure the serial port and send all data through it. I don't use the Apple MIDI driver, nor OMS nor QuickTime. I'm not knowledgeable in all eras past 7.5.5 in Macs...

 

[Forrest]

Thanks - I’ll have to try it out with my Roland SC.

Does the program work with System 7.5 or OS 8?