[Stk] help with stk fundamentals
vinayak@lightningcast.com
vinayak@lightningcast.com
Thu, 20 Mar 2003 17:53:56 -0500
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Hi all..
I am a newbie to stk and digital signal processing, though otherwise an =
experienced software engineer.
I succeeded in creating an application using stk. The application is =
intended for music students (like me). Thanks a ton to stk for making =
the audio generation part so simple. But I am facing a few problems and =
need some help.
1. Whats the role of the sinewave.raw file ? what information does it =
contain and why does my stk based app need that file ?
2. My application uses the Flute class. Here are some specific problems =
I am facing.
a. When I tri to play N notes one after the other in a sequence, the =
last note keeps playing forever. I was able to solve this by putting a =
wvout->stop() after playing each note but this makes the shift between =
notes abrupt. Why this problem and whats the right solution?
b. Some low frequencies ( 130 > f < 440hz) dont play well, there is =
noticeable distortion. Higher frequencies play better. Again, why this =
problem and what is the best solution. I have set the minimum playable =
freq on the flute to much lower (40).
c. I am trying to produce the sounds of a "North Indian Flute", also =
called a "Bansuri". Is there any way I can add this sound to stk ? Or, =
is there any way to modify the sound of the Flute in the stk so that it =
sounds smoother ?=20
3. What is the right way to produce notes using the Flute class ? I am =
currently using the wvout->tick(flute->tick()) method. But then whats is =
the use of the StartBlowing and StopBlowing methods ? They dont seem to =
be having any impact at all. Right now I need to first do a noteon, then =
the tick() in a loop and then noteoff followed by wvout->stop for each =
note. Is this the best approach ? Any suggestions, comments ?
=20
Thanks to the evangelists in advance :-)
Best Regards,
-Vinayak
"Nearly all men can stand adversity, but if you want to test a man's =
character,=20
give him power."=20
-Abraham Lincoln
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<P><FONT SIZE=3D2 FACE=3D"Arial">Hi all..</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">I am a newbie to stk and digital signal =
processing, though otherwise an experienced software engineer.</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">I succeeded in creating an application =
using stk. The application is intended for music students (like me). =
Thanks a ton to stk for making the audio generation part so simple. But =
I am facing a few problems and need some help.</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">1. Whats the role of the sinewave.raw =
file ? what information does it contain and why does my stk based app =
need that file ?</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">2. My application uses the Flute class. =
Here are some specific problems I am facing.</FONT>
<BR> <FONT SIZE=3D2 =
FACE=3D"Arial">a. When I tri to play N notes one after the other in a =
sequence, the last note keeps playing forever. I was able to solve this =
by putting a wvout->stop() after playing each note but this makes the =
shift between notes abrupt. Why this problem and whats the right =
solution?</FONT></P>
<P> <FONT SIZE=3D2 =
FACE=3D"Arial">b. Some low frequencies ( 130 > f < 440hz) dont =
play well, there is noticeable distortion. Higher frequencies play =
better. Again, why this problem and what is the best solution. I have =
set the minimum playable freq on the flute to much lower =
(40).</FONT></P>
<P> <FONT SIZE=3D2 =
FACE=3D"Arial">c. I am trying to produce the sounds of a "North =
Indian Flute", also called a "Bansuri". Is there any way =
I can add this sound to stk ? Or, is there any way to modify the sound =
of the Flute in the stk so that it sounds smoother ? </FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial">3. What is the right way to produce =
notes using the Flute class ? I am currently using the =
wvout->tick(flute->tick()) method. But then whats is the use of =
the StartBlowing and StopBlowing methods ? They dont seem to be having =
any impact at all. Right now I need to first do a noteon, then the =
tick() in a loop and then noteoff followed by wvout->stop for each =
note. Is this the best approach ? Any suggestions, comments ?</FONT></P>
<P><FONT SIZE=3D2 FACE=3D"Arial"> </FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">Thanks to the evangelists in advance =
:-)</FONT>
</P>
<P><FONT SIZE=3D2 FACE=3D"Arial">Best Regards,</FONT>
<BR><FONT SIZE=3D2 FACE=3D"Arial">-Vinayak</FONT>
<BR><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Verdana">"Nearly all =
men can stand adversity, but if you want to test a man's character, =
</FONT>
<BR><FONT COLOR=3D"#0000FF" SIZE=3D2 FACE=3D"Verdana">give him =
power."</FONT><FONT COLOR=3D"#0000FF" FACE=3D"Times New Roman"> =
</FONT>
<BR><FONT FACE=3D"Times New Roman">-<B></B></FONT><B><FONT =
COLOR=3D"#FF0000" FACE=3D"Times New Roman">Abraham Lincoln</FONT></B>
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