few years ago I bought this keyboard MIDI (MK-3701) on ebay. It is purely a MIDI keyboard, speaker and generates no sound. To use it must be connected to a MIDI port as having the old sound cards.
The first option was to directly connect the keyboard to the OPL3 synthesizer of the card (by rosegarden - ). But for some reason not working.
- The second option was to use a software synthesizer (timidity ) and use the PCM output. The problem is the CPU usage (is a PC with ISA bus ...) and the sound quality (this card seems to work in 8 bits).
- The option works best for me is to use my new laptop to synthesize sound. For this I have to send the MIDI over the network (at first I tried rosegarden and
- multimidicast ). The simplest and most efficient way to send MIDI events on the network is to use ALSA tools:
First run this on the old PC that has the keyboard:
aseqnet & # Launch MIDI server network
aseqdump-l # List of available devices (16:0 Avance Logic, 128:0 Net Client)
aconnect 16:0 128:0 # Connect the keyboard to input MIDI server .
then run it on the laptop: 192.168.1.10 aseqnet
& IP # Connect to the MIDI server
timidity-iA-OS1-B 2.3 & # Launch the software synthesizer (Note that you No assigned 128:0)
aseqdump-l # List of available devices (Net Client 129:0) 129:0 128:0 aconnect
If something goes wrong the first thing is to check that the sound is being sent over the network: Run both commands client # Connect MIDI synthesizer
After this I can already play the piano with low latency and high sound quality.
aseqnet
and to measure traffic on the network pusar keys (should rise to ~ 1 kb / s).
The problem with this design is that the stereo headphones connect to a single source only hear the left earpiece. If everything had been designed differently from the beginning might have avoided this problem (having made the shorter the piece of dough from scratch).
The
solution I think more accurate would have been to separate amplifiers for each channel, and even a short circuit detector to avoid causing suffering electronics. But that is beyond me.
The Wheel of Fortune using SMS as a popular television commercial TV channel. All have been problems, and I have not fully functioned despite my kung-fu.
Trial 1: P "J4" to "343." After sending my phone model: LG KU250.