Date: Sun, 18 Apr 1999 15:06:17 +0900 From: Seigo TANIMURA <tanimura@naklab.dnj.ynu.ac.jp> To: nox@jelal.kn-bremen.de Cc: tanimura@naklab.dnj.ynu.ac.jp, zinnia@jan.ne.jp, freebsd-hackers@freebsd.org, freebsd-multimedia@freebsd.org Subject: Re: Call for Review: Voxware midi driver for serial ports Message-ID: <19990418150617N.tanimura@sakuramail.com> In-Reply-To: Your message of "Sat, 17 Apr 1999 13:37:07 %2B0200" <19990417133707.A39454@saturn.kn-bremen.de> References: <19990417133707.A39454@saturn.kn-bremen.de>
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From: Juergen Lock <nox@jelal.kn-bremen.de> Subject: Re: Call for Review: Voxware midi driver for serial ports Date: Sat, 17 Apr 1999 13:37:07 +0200 Message-ID: <19990417133707.A39454@saturn.kn-bremen.de> nox> > nox> > For the modules with serial interfaces(most modern ones like Roland SC-88 have): nox> > nox> > nox> > nox> > 38.4kbps nox> > nox> > PC ----------------------------- Midi Module nox> > nox> > Serial Cable for the Module nox> > nox> > nox> > nox> > I got to play sequences successfully under the situation shown above. nox> > nox> > I used SC-88, with a 'computer port'. It accepts the bitrates of both 31.25kbps nox> > nox> > and 38.4kbps, transforming the signal internally. You can plug some other nox> > nox> > midi modules and instruments to the module connected to the PC. In this case nox> > nox> > the module also acts as a midi interface. nox> > nox> nox> > nox> Has anyone tried things like sending a big sysex dump to something nox> > nox> connected there? nox> > nox> > nox> > I tried sending sysex messages to display some frames of picture on the LCD of SC-88. nox> > One frame takes 64 bytes. I sent sysex at around 6-8 frames/sec for 10 seconds. nox> > I had no latency to recognize, as I experienced on sbmidi. nox> nox> I thought about that as a means to test flow control, for that I'd guess nox> you have to hook someting up on the SC-88's midi port and send _it_ nox> something big. OTOH maybe even that won't be enough, RAM is cheap today nox> and who knows how big a buffer the SC-88 has... I am afraid I have no more modules nor instruments, so I cannot do anything further. Another bad news, I tried driving my SC-88 connected directly to a PC using Windows 95 and Portman PC/S driver, to find a miserable result. I saw no midi messages come properly, so Portman PC/S should be cooking the signals in some way... Seigo TANIMURA |M2, Nakagawa Lab, Dept of Electronics & CS =========================|Faculty of Engineering, Yokohama National Univ Powered by SIEMENS, |http://www.naklab.dnj.ynu.ac.jp/~tanimura/ FreeBSD 4.0-CURRENT |http://www.sakura.ne.jp/~tcarrot/ (10th Apr 1999) & muesli.|tanimura@naklab.dnj.ynu.ac.jp tcarrot@sakuramail.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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