Subject: Re: Sound head of the 'Moviola' From: Kevin Austin <kevin.austin@xxxxxxxx> Date: Wed, 29 Dec 2010 16:29:19 -0500 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--Boundary_(ID_nX4O6QhXzoiek0KIk+7K1Q) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT In the time domain, as Hugh Le Caine used to say, everything is amplitude (displacement). As I understand this, frequency and phase are derived from amplitude in [quantized] time. Kevin On 2010, Dec 29, at 2:47 AM, ita katz wrote: > But the amplitude does not carry all the information needed to recreate the sound. Similarly, the "Sound-on-Film" entry states: > > stereo variable-area (SVA) recording, encoding a two-channel audio signal as a pair of lines running parallel with the film's direction of travel through the projector. The lines change area (grow broader or narrower) depending on the magnitude of the signal. > > Again, what encodes the frequency/phase? > > Thank you > > Ita. --Boundary_(ID_nX4O6QhXzoiek0KIk+7K1Q) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT <html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><div>In the time domain, as Hugh Le Caine used to say, everything is amplitude (displacement). As I understand this, frequency and phase are derived from amplitude in [quantized] time.</div><div><br></div><div>Kevin</div><div><br></div><div><br></div><div><br></div><br><div><div>On 2010, Dec 29, at 2:47 AM, ita katz wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div dir="ltr"><div>But the amplitude does not carry all the information needed to recreate the sound. Similarly, the "Sound-on-Film" entry states:<br><br><blockquote style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;" class="gmail_quote"> <a href="http://en.wikipedia.org/w/index.php?title=Stereo_variable-area&action=edit&redlink=1" class="new" title="Stereo variable-area (page does not exist)">stereo variable-area</a> (SVA) recording, encoding a two-channel audio signal as a pair of lines running parallel with the film's direction of travel through the projector. The lines change area (grow broader or narrower) depending on the magnitude of the signal.</blockquote><div><br>Again, what encodes the frequency/phase?<br><br>Thank you<br><br>Ita.</div></div></div></blockquote><div><br></div><div><br></div><div><br></div></div></body></html> --Boundary_(ID_nX4O6QhXzoiek0KIk+7K1Q)--