From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Juhana Sadeharju" Date: Mon, 19 Jun 2000 18:50:01 +0000 Subject: Re: [linux-audio-dev] Re: Multimedia compression Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sound@vger.kernel.org >From: Benno Senoner > >I prefer to use MPEG Layer 2 ( MP2) at 384kbit (lossy) which outperforms all >MP3 based codecs even 320kbit. How do you know it? Where I could read tests about it? I have used layer 3 with 320 kbps for compressing radio and cassette recordings (both music and sound samples snipped from them), so, most probably I have used the right compressor. But is layer 3 with 320 kbps somehow not enough for studio mikes (voice, guitar, etc.) or for digital synth tracks? Of course, for compressing the final mix (20-bit or greater) of studio work, the 16-bit MP3 is not enough. But 16-bit could be enough for individual sounds, vocals, etc. However, I would not use any MP3 compression for even those because I would record only with 20-bit A/Ds in studio. I have used MP3 only because I have nothing better than 16-bit A/Ds. So, what compressor I could use for 20- or 24-bit material? Should we look at ourself for 20- or 24-bit compressor or can MP3 or AAC handle them (similarly than JPEG can handle 16-bit/channel images)? Note that 16-bit is most probably enough for mic recordings, but the extra bits are needed for having extra room. I would not want to dither 20-bit recording down to 16-bit even it would fit very well. Juhana