Date: Mon, 05 Apr 1999 12:33:05 +0900 From: Motonori Shindo <mshindo@ascend.co.jp> To: dkelly@hiwaay.net Cc: luigi@labinfo.iet.unipi.it, freebsd-multimedia@FreeBSD.ORG Subject: Re: Luigi's driver, AOpen AW37, and me. Message-ID: <19990405123305Y.mshindo@ascend.co.jp> In-Reply-To: <199904050236.VAA00828@nospam.hiwaay.net> References: <199904050236.VAA00828@nospam.hiwaay.net>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi, From: David Kelly <dkelly@hiwaay.net> Subject: Re: Luigi's driver, AOpen AW37, and me. Date: Sun, 04 Apr 1999 21:36:05 -0500 > Believe others have reported the -Pro worked. I have the not-Pro. The > Pro uses the CS4237 while mine uses a CX4235-XQ3 EP (this is the first > time I bothered to read the exact numbers off the chip). Both AW37 and AW37Pro use CS4235. Please refer to http://www.aopenusa.com/index5.htm I also confirmed this by actually looking at the card I bought. It was CS4235-XQ3 EP, indeed. > The reason I was able just now to read the numbers directly off the chip > is the AOpen card is out, a $14 Yamaha 714 card is in, and FreeBSD now > makes recognizable noises. But when not making those noises it cranks > out static from internal noises in the cheap card and computer power > supply. > > Have cleaned up things here so I don't have my printed copies of the > Crystal Semiconductor manuals handy where my notes are. Suspected > several things. One is a calibration proceedure spec'ed by CS. At first > I thought the PCM driver didn't implement it. Then I found code > resembling what was spec'ed, almost. I don't believe it was doing what > the CS book said needed done even if it was really trying to calibrate > rather then the quickie no-calibrate initialization. I hacked in a > replacement, which did no good either. > > Another thing I worried about is whether bytes were being written in the > right order. Or the CODEC on the card was not initialized correctly. > Didn't seem to matter much if files were pushed thru /dev/audio or > /dev/dsp, they both sounded the same. > > Don't remember if I had a mic to try "cat < /dev/audio > /dev/audio". I did this but nothing happened. > With that in mind my next planned attack was to take a signal generator > and capture a known sine and square wave input, and examine the raw > data captured. Also to output known sine and square wave output and > view on my DSO. For several reasons, never got around to it. Not the > least of the reasons is this place is too much of a mess to get the DSO > and signal generators near the computer. If you find anything new, please let me know. I will start reading the datasheet. > -- > David Kelly N4HHE, dkelly@nospam.hiwaay.net > ===================================================================== > The human mind ordinarily operates at only ten percent of its > capacity -- the rest is overhead for the operating system. > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-multimedia" in the body of the message > ===================================== Motonori Shindo Systems Engineer Ascend Communications Japan K.K. email: mshindo@ascend.co.jp TEL: +81-3-5325-7306 ===================================== To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?19990405123305Y.mshindo>