Praat vowel synthesis (Daniel Silva )


Subject: Praat vowel synthesis
From:    Daniel Silva  <silvadmr(at)BOL.COM.BR>
Date:    Tue, 14 Jun 2005 21:34:43 -0300

--------------Boundary-00=_V9O324L0000000000000 Content-Type: Multipart/Alternative; boundary="------------Boundary-00=_V9O3XFP0000000000000" --------------Boundary-00=_V9O3XFP0000000000000 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi=0D =0D Could anybody help me?=0D =0D What I am currently trying to do is to create a vowel continuum through varying the F1 value in a range that goes from 300 to 600 Hz. =0D I have tried the Praat source-filter synthesis, thus creating a formant t= ier and associating it to a source which is either extracted from a sound or created from scratch. =0D The problem I am encountering is that when I create a sound associating t= he formant tier to the source signal and query its F1 value (or the value of= =20 any one of the formants), I am getting a different value from the one = I had previously fixed in the formant tier.=0D I am a novice and I can not imagine an explanation for this discrepancy other than some kind of effect the source could have over the filter.=0D What could be wrong? Would you have any suggestions of what could have be= en done differently?=0D How is it possible to create a sound with the =93exact=94 formant value I= intend? --------------Boundary-00=_V9O3XFP0000000000000 Content-Type: Text/HTML; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; charset=3Diso-8859-= 1"> <META content=3D"IncrediMail 1.0" name=3DGENERATOR> <!--IncrdiXMLRemarkStart> <IncrdiX-Info> <X-FID>BA285063-5BCE-11D4-AF8D-0050DAC67E11</X-FID> <X-FVER>2.0</X-FVER> <X-FIT>Letter</X-FIT> <X-FILE>Letter\rice_fields.imf</X-FILE> <X-FCOL>Elegant Paper</X-FCOL> <X-FCAT>Stationery</X-FCAT> <X-FDIS>Rice Fields</X-FDIS> <X-Extensions>SU1CTDEsNDEsgUmBSTAkkcGNgZmVTY0wNCxNhYUoiU0kOMEoTYGBjYEoJDS= ZnSyFhUksSU1CTDIsMCwsSU1CTDMsMCws</X-Extensions> <X-BG>6FF0C833-8BB7-4869-B825-9922A074AF64</X-BG> <X-BGT>repeat</X-BGT> <X-BGC>#eff3f7</X-BGC> <X-BGPX>left</X-BGPX> <X-BGPY>0px</X-BGPY> <X-ASN></X-ASN> <X-ASNF></X-ASNF> <X-ASH></X-ASH> <X-ASHF></X-ASHF> <X-AN></X-AN> <X-ANF></X-ANF> <X-AP></X-AP> <X-APF></X-APF> <X-AD></X-AD> <X-ADF></X-ADF> <X-AUTO>X-ASN,X-ASH,X-AN,X-AP,X-AD</X-AUTO> <X-CNT>;</X-CNT> </IncrdiX-Info> <IncrdiXMLRemarkEnd--> </HEAD> <BODY style=3D"BACKGROUND-POSITION: left 0px; FONT-SIZE: 12pt; MARGIN: 0p= x 10px 10px; COLOR: #00005b; BACKGROUND-REPEAT: repeat; FONT-FAMILY: Aria= l" text=3D#00005b bgColor=3D#eff3f7 background=3Dcid:6FF0C833-8BB7-4869-B= 825-9922A074AF64 scroll=3Dyes SIGCOLOR=3D"0" ORGYPOS=3D"0"> <TABLE id=3DINCREDIMAINTABLE cellSpacing=3D0 cellPadding=3D2 width=3D"100= %" border=3D0> <TBODY> <TR> <TD id=3DINCREDITEXTREGION style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 0px= ; FONT-SIZE: 12pt; PADDING-BOTTOM: 0px; CURSOR: auto; PADDING-TOP: 0px" v= Align=3Dtop width=3D"100%"> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><SPAN lang=3DEN-US sty= le=3D"mso-ansi-language: EN-US"><FONT color=3D#000000><FONT face=3D"Times= New Roman">Hi</FONT></FONT></SPAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><SPAN lang=3DEN-US sty= le=3D"mso-ansi-language: EN-US"><FONT color=3D#000000><FONT face=3D"Times= New Roman"><?xml:namespace prefix =3D o ns =3D "urn:schemas-microsoft-co= m:office:office" /><o:p></o:p></FONT></FONT></SPAN>&nbsp;</P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><SPAN lang=3DEN-US sty= le=3D"mso-ansi-language: EN-US"><o:p><FONT face=3D"Times New Roman" color= =3D#000000>&nbsp;</FONT></o:p></SPAN><SPAN lang=3DEN-US style=3D"mso-ansi= -language: EN-US"><FONT color=3D#000000><FONT face=3D"Times New Roman">Co= uld anybody help me?<o:p></o:p></FONT></FONT></SPAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><SPAN lang=3DEN-US sty= le=3D"mso-ansi-language: EN-US"><o:p><FONT face=3D"Times New Roman" color= =3D#000000>&nbsp;</FONT></o:p></SPAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><SPAN lang=3DEN-US style=3D"mso-ansi-lang= uage: EN-US; mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><FO= NT color=3D#000000><FONT face=3D"Times New Roman">What I am currently try= ing to do is to create a vowel continuum through varying the F1 value in = a range that goes from 300 to 600 Hz. <o:p></o:p></FONT></FONT></SPAN></P= > <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><FONT color=3D#000000><FONT face=3D"Times= New Roman"><SPAN lang=3DEN-US style=3D"mso-ansi-language: EN-US; mso-bid= i-font-weight: bold; mso-bidi-font-style: italic">I have tried the Praat = source-filter synthesis, thus creating a formant tier and associating it = to a source which is either extracted from a sound or created from scratc= h. </SPAN><SPAN lang=3DEN-US style=3D"mso-ansi-language: EN-US"><o:p></o:= p></SPAN></FONT></FONT></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><SPAN lang=3DEN-US style=3D"mso-ansi-lang= uage: EN-US; mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><FO= NT color=3D#000000><FONT face=3D"Times New Roman">The problem I am encoun= tering is that when I create a sound associating the formant tier to the = source signal and query its F1 value (or the value of<SPAN style=3D"mso-s= pacerun: yes">&nbsp; </SPAN>any one of the formants),<SPAN style=3D"mso-s= pacerun: yes">&nbsp; </SPAN>I am getting<SPAN style=3D"mso-spacerun: yes"= >&nbsp; </SPAN>a different value<SPAN style=3D"mso-spacerun: yes">&nbsp; = </SPAN>from the one I had previously fixed in the formant tier.<o:p></o:p= ></FONT></FONT></SPAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><SPAN lang=3DEN-US style=3D"mso-ansi-lang= uage: EN-US; mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><FO= NT color=3D#000000><FONT face=3D"Times New Roman">I am a novice and I can= not imagine an explanation for this discrepancy other than some kind of = effect the source could have over the filter.<o:p></o:p></FONT></FONT></S= PAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><SPAN lang=3DEN-US style=3D"mso-ansi-lang= uage: EN-US; mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><FO= NT color=3D#000000><FONT face=3D"Times New Roman">What could be wrong? Wo= uld you have any suggestions of what could have been done differently?<o:= p></o:p></FONT></FONT></SPAN></P> <P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p= t; mso-layout-grid-align: none"><SPAN lang=3DEN-US style=3D"mso-ansi-lang= uage: EN-US; mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><FO= NT color=3D#000000><FONT face=3D"Times New Roman">How is it possible to c= reate a sound with the =93exact=94 formant value I intend?<o:p></o:p></FO= NT></FONT></SPAN></P></TD></TR> <TR> <TD id=3DINCREDIFOOTER width=3D"100%"> <TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%"> <TBODY> <TR> <TD width=3D"100%"></TD> <TD id=3DINCREDISOUND vAlign=3Dbottom align=3Dmiddle></TD> <TD id=3DINCREDIANIM vAlign=3Dbottom align=3Dmiddle></TD></TR></TBODY></T= ABLE></TD></TR></TBODY></TABLE><SPAN id=3DIncrediStamp><SPAN ltr??><A hre= f=3D"http://www.incredimail.com/index.asp?id=3D422&amp;lang=3D22"><IMG al= t=3D"" hspace=3D0 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http://www.auditory.org/postings/2005/
maintained by:
DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University