Trials with Alesis Serial driver
Posted by Riccardo on September 22, 1998 at 02:03:08:
I want to tell you my experience with my new QS7 connected via serial cable to a portable computer
because I think it can be useful to someone.
At first the things seems very straight: connect the cable, set QS7 to PC 38.4, set GenMIDI on, install the
driver in Win98, double click on a .MID and it plays !
But I noticed a problem with some MIDI files: there
were some notes or tracks out of tune.
Finally I found that lowering the driver speed from
115 k (default) to 38.4 everything remains in tune.
Then I tried to record MIDI tracks but nothing seems
to come to the keyboard. Dumping SYSEX data into FreeLOADER showed few bytes incoming then it stopped.
I resolved it increasing the Input Persistance
parameter from 0 (default) to 150, altough I have a
Pentium 133 with the 16550 serial chip, presented in
the readme.txt file as the optimum.
I tried a lot of values and this is the minimum that works fine.
I would like to test the Roland driver to see if it
simpler or at least more coherent, but I read in its
readme file that for most PC it must be connected at
31.25, that is the MIDI serial clock !?!.
Hope it can be useful to someone.
- Re: Trials with Alesis Serial driver (try new Roland driver) Dan Halbert 9/22/98