As far as I can get you and asaik Your underlying driver/dsp chip should allow you to play it in any format/chaanel/sampling rate tou want. When you write the code for recording and playing you specify these three parameters. I have done this exercise on symbian and wince but not on linux. For more reference I found these 2 releveant links http://www.speech.cs.cmu.edu/festival/cstr/festival/free-1.4.1/PATCHES/voxwa re.cc look into play_voxware_wave function and http://www.oreilly.de/catalog/multilinux/excerpt/ch14-05.htm Gowri. -----Original Message----- From: Amith [mailto:amith@multitech.co.in] Sent: Tuesday, February 17, 2004 11:18 AM To: Newbies Cc: Gowri Ramasubramanian Subject: Re: Sound Programming. hmm.. nope not on a desktop - iam using the same code to play the file i just do some changes to the source file so that it reads from the file - (which contains the recorded voice data, that was recorded from a diff system ) and writes to "/dev/dsp" rather than reading from /dev/dsp . Hope iam clear now. And iam wondering how do people manage code so that it plays a certain channel/format/sampling rate clearly on diff systems - iam confused :-( . does this disparity have something to do with hardware ????? cheers, Amith Gowri Ramasubramanian wrote: > What are you playing the file with? your own program or another application > already present? > > In that case when you play the file you should ensure that the format, rate > and chaanels of the application you are using to play are the same as you > had used for recording. > > And are you doing it on a desktop? > > Gowri. > > -----Original Message----- > From: kernelnewbies-bounce@nl.linux.org > [mailto:kernelnewbies-bounce@nl.linux.org] > Sent: Tuesday, February 17, 2004 9:53 AM > To: Newbies > Subject: Sound Programming. > > hi all, > i had sent a similar query before. Now, the problem i have > is something like this : > i use OSS sound programming guide as a reference. > i use the API given in <linux/souncard.h> > i set the number of channels to one (1) Mono. /* ioctl calls > */ > i set the sampling rate to 11025 > i set the sampling format to Unsigned Little Endian . > Now i record sound for sometime using read() and play it > back on my system using write() it works fine. > I write the recorded sound (data) to a file through my > program and i copy the file to another system. > I try playing it there it gives me a loud noise . The reason > i'am sending this query again is that many people had rightly > pointed out that i hadn't set the Channels/Format/Sampling > Rate (then) . But now i have done all this but it still > seems to me that the problem persists. Could anyone help ? > > Thank you. > -Amith > > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
