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


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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?
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le=3D"mso-ansi-language: EN-US"><FONT color=3D#000000><FONT face=3D"Times=
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<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=
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<P class=3DMsoNormal style=3D"MARGIN: 0cm 0cm 0pt"><SPAN lang=3DEN-US sty=
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=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=
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<P class=3DMsoNormal style=3D"MARGIN: 0cm 0.9pt 0pt 0cm; tab-stops: 36.0p=
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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=
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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>
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This message came from the mail archive
http://www.auditory.org/postings/2005/
maintained by:
DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University