From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <398DD37B.76A60CC7@ncal.verio.com> Date: Sun, 06 Aug 2000 14:07:07 -0700 From: Henry Worth MIME-Version: 1.0 To: linuxppc-dev@lists.linuxppc.org Subject: Re: CDDA playback on Pismo (and other newer models) Content-Type: text/plain; charset=iso-8859-1 Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: References: <398A91CA.F8D3C489@student.ethz.ch> Michel Dänzer wrote: > > Henry Worth wrote: > > > Rebuilding the kernel to use SCSI generic devices with IDE SCSI > > emulation produced much better, even usable, results. At startup > > there are still a couple of dropouts in the first few seconds, > > but after that the playback is clean across multiple tracks (even > > with a concurrent kernel compile). Piping cdparanoia to /dev/null > > shows data rates of 187sectors/sec at all -S settings (and default). > > From the the drive's spin-up sounds it seems to always be in > > high-speed mode, but unlike the ATAPI driver, there is little > > head movement noise. > > Does it also improve audio grabbing? With 2.2.15, both IDE and SCSI emulation > almost killed the system... > Haven't seen any instability between the two interfaces (2.2.17pre15-ben1, though I have had a number of sponstaneous powerdowns when using the modem this weekend -- the PMU gets testy when it doesn't get immediate attention, a problem with at least the recent kernels -- haven't used the modem much with the early Pismo capable kernels). With cdparanoia's error correction enabled the SCSI interface is about 30-50% faster ripping tracks (~2-3X). With the error correction disabled (-Z), both interfaces are the same speed (~6X) and I get files that compare identically. ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/