Date: Thu, 15 Apr 1999 20:33:07 +0200 From: Juergen Lock <nox@jelal.kn-bremen.de> To: Seigo TANIMURA <tanimura@naklab.dnj.ynu.ac.jp> Cc: 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: <19990415203307.A33640@saturn.kn-bremen.de> In-Reply-To: <199904150204.LAA33326@rina.naklab.dnj.ynu.ac.jp>; from Seigo TANIMURA on Thu, Apr 15, 1999 at 11:04:39AM %2B0900 References: <19990414224345.A99120@saturn.kn-bremen.de> <199904150204.LAA33326@rina.naklab.dnj.ynu.ac.jp>
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On Thu, Apr 15, 1999 at 11:04:39AM +0900, Seigo TANIMURA wrote: > On Wed, 14 Apr 1999 22:43:45 +0200, > Juergen Lock <nox@jelal.kn-bremen.de> said: > > >> We have at least one product to convert a serial port to a midi port and vice versa: > >> > >> http://www.midi-classics.com/p2615.htm > >> > >> has one midi output and one input, although our driver is not capable to receive midi signal yet. > > nox> Huh, it is send only? :) or do you mean with that interface... What > nox> would be required to make it work? > > > Sorry, I had a misunderstanding. Tsuyoshi-san pointed me out that our driver is > able to receive midi signal as well. I was just not able to test by myself... > > > Using Portman PC/S, you will have something like this: > > 38.4kbps 31.25kbps > PC ---------- Portman PC/S ----------- Midi Module > Portman Midi > Serial Cable > Cable > > > Portman transforms the singal bitrate and the electrical characteristics. Hmm as 38.4kbps is > 31.25kbps, does the driver respect flow control when sending? > Portman has its own cable contained in the product. > > Since I do not have a Portman now, I am not convinced whether we can drive > it using our driver or not. Things will be tough if Portman cooks the signal > from and/or to PC. This seems more likely for the multi-port midi-serial > interfaces, especially the ones capable to select the {in,out}out ports > by the PC. > Agreed... > > For the modules with serial interfaces(most modern ones like Roland SC-88 have): > > 38.4kbps > PC ----------------------------- Midi Module > Serial Cable for the Module > > I got to play sequences successfully under the situation shown above. > I used SC-88, with a 'computer port'. It accepts the bitrates of both 31.25kbps > and 38.4kbps, transforming the signal internally. You can plug some other > midi modules and instruments to the module connected to the PC. In this case > the module also acts as a midi interface. Has anyone tried things like sending a big sysex dump to something connected there? Regards, -- Juergen Lock <nox@jelal.kn-bremen.de> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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