Date: 06 Sep 1997 12:02:57 +0200 From: Jacob Bohn Lorensen <jacob@jblhome.ping.dk> To: Luigi Rizzo <luigi@labinfo.iet.unipi.it> Cc: multimedia@FreeBSD.ORG Subject: Re: snd970904.tgz - can't hear anything while sampling from CD. Message-ID: <87iuwe4v5a.fsf@pippin.jblhome.ping.dk> In-Reply-To: Luigi Rizzo's message of Sat, 6 Sep 1997 05:51:43 %2B0200 (MET DST) References: <199709060351.FAA13137@labinfo.iet.unipi.it>
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Luigi Rizzo <luigi@labinfo.iet.unipi.it> writes: > In order to remove the feedback, I decided to disconnect from the > output mixer the source(s) currently being used for record. This > explains the behaviour you see. But it makes it really difficult to sample for example the guitar solo only from a song on a CD. I wish to do this and then somehow transform the sample so I can play it at half speed but still have the correct tuning. I.e., if you just sample at 44100 Hz and then play the sample at 22050 Hz, you're almost done - except for the fact that all frequencies are halved (even the most soprano voice turns almost to a bass voice :-) > I could have let the user selectively disable sources to the output > mixer but there is no ioctl() to do that, so I would need a new one, > and applications would not work without recompiling. What was done in the old sound driver? I seem to remember having heard what was being sampled while it was being sampled on one of my friends' computer; he had en non-pnp SB16, I think. If you sample from the CD or "line in" only there should be no problem with feedback? Only if you sample from a microphone should the input source be cut away... I think... Thanks again, Jacob. -- Jacob Lorensen; Mosebuen 33, 1.; DK-2820 Gentofte, Denmark; +45-31560401 PGP ID = E596F0B5; PGP Fingerprint = 1E8726467436DC4A 723B6678C5AD9E71
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