Subject: Robust method of fundamental frequency estimation. From: Roisin Loughran <roisinaud@xxxxxxxx> Date: Wed, 31 Jan 2007 17:11:52 +0000 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>--0-619710193-1170263512=:68894 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Dear list,=0A=0AI was wondering if any of you know the most robust way to c= alculate the fundamental frequency of a note across the range of a variety = of instruments?=0A=0AI'm currently working on a matlab program and have tri= ed using the auto-correlation method and the cepstrum method but have found= that these both have difficulty in calculating f0 of timbre-rich tones suc= h as those from a piano - particularly in the lower pitch ranges. Does anyo= ne know of a method that is more reliable in these regions or is it necessa= ry that I investigate such complex tones by a different means? From examini= ng a number of the FFTs from these signals it is tempting to just pick the = first strongest partial - the complex overtones just seem to confuse the mo= re complicated algorithms, but I realise that this is hardly a reliable app= roach.=0A=0AAny suggestion would be greatly appreciated,=0AThanks in advanc= e,=0A=0ARoisin Loughran=0A=0A=0A=0A=0A=09=09=0A____________________________= _______________________________ =0ATo help you stay safe and secure online,= we've developed the all new Yahoo! Security Centre. http://uk.security.yah= oo.com --0-619710193-1170263512=:68894 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable <html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></he= ad><body><div style=3D"font-family:times new roman, new york, times, serif;= font-size:12pt"><div>Dear list,<br><br>I was wondering if any of you know t= he most robust way to calculate the fundamental frequency of a note across = the range of a variety of instruments?<br><br>I'm currently working on a ma= tlab program and have tried using the auto-correlation method and the cepst= rum method but have found that these both have difficulty in calculating f0= of timbre-rich tones such as those from a piano - particularly in the lowe= r pitch ranges. Does anyone know of a method that is more reliable in these= regions or is it necessary that I investigate such complex tones by a diff= erent means? From examining a number of the FFTs from these signals it is t= empting to just pick the first strongest partial - the complex overtones ju= st seem to confuse the more complicated algorithms, but I realise that this= is hardly a reliable approach.<br><br>Any suggestion would be greatly appreciated,<br>= Thanks in advance,<br><br>Roisin Loughran<br></div></div><br>=0A=09=09<hr s= ize=3D1> =0ANew Yahoo! Mail is the ultimate force in competitive emailing. = Find out more at the <a href=3D"http://uk.rd.yahoo.com/mail/uk/taglines/def= ault/championships/games/*http://uk.rd.yahoo.com/evt=3D44106/*http://mail.y= ahoo.net/uk/">Yahoo! Mail Championships</a>. Plus: play games and win prize= s.</body></html> --0-619710193-1170263512=:68894--