I don't know if this fits your needs, but it would be fairly simple to produce a logarithmic *graph* of the linear frequency analysis produced by the pvs opcodes.  But the data itself would still be spaced linearly.  If that doesn't help, I don't know of anything.
<br><br>-Chuckk<br><br><div><span class="gmail_quote">On 10/9/07, <b class="gmail_sendername">Gregory Cooksey</b> &lt;<a href="mailto:cooksey@cs.wisc.edu">cooksey@cs.wisc.edu</a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br><br>I&#39;m trying to figure out a way to transform audio files from the<br>standard amplitude over time format to some kind of frequency over<br>time format, preferably with frequency values spaced along a<br>logarithmic scale.&nbsp;&nbsp;This is for a machine learning experiment.
<br><br>I&#39;ve been trying to figure out if I can use csound to perform the<br>transformation.&nbsp;&nbsp;It looks like the spectrum opcode may do what I&#39;m<br>looking for, but I&#39;m having a hard time figuring out what its output
<br>signal looks like.&nbsp;&nbsp;Is the wsig data type documented anywhere, or is<br>there a better way to do what I&#39;m trying to do?<br><br>If I haven&#39;t explained what I want well enough let me know and I&#39;ll<br>try to clarify.
<br><br>Thanks for any help.<br><br>-Greg<br><br>--<br>Send bugs reports to this list.<br>To unsubscribe, send email to <a href="mailto:csound-unsubscribe@lists.bath.ac.uk">csound-unsubscribe@lists.bath.ac.uk</a><br></blockquote>
</div><br><br clear="all"><br>-- <br><a href="http://www.badmuthahubbard.com">http://www.badmuthahubbard.com</a>