Re: synth seems to generate "pops"?

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On Wed, 26 Mar 2025 at 04:50, Jan Stary <[email protected]> wrote:

> > This won't really work.  I'm planning to play hundreds of tones with
> logic
> > like "that frequency on that channel was heard at -30dB - next time try
> > -40dB" etc. etc.
>
> That is a very flawed hearing test. Your hearing accomodates
> and dis-accomodates quite quickly according the the sounds
> heard just before. There is a reason perception tests contain
> breaks and intermitent music jingles. Listening to twenty
> half-second sine tones in sequence will very much influence
> your hearing of the next half-seconf sine tone.


I'm not trying to do anything scientifically significant - I have no
background knowledge to base it on.  It's just an experiment/learning
exercise.  That being said, I am (pseudo)randomising the tone order and ear
tested.  I am also iterating over the test tones multiple times (I'm up to
45 iterations so far) with breaks in between - each iteration refines the
result (just audible volume) for each frequency.

In another mail you asked about the version of sox I'm using - I have not
tried any other versions and I won't be - you may have seen in mail to
someone else that I have "solved" my issue by fading the generated tones
for 0.05 of a second at each end.  My theory is that the "pops" I was
hearing were simply some hardware in my audio chain reacting to the instant
volume changes.

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<div dir=3D"ltr"><div class=3D"gmail_quote gmail_quote_container"><div dir=
=3D"ltr" class=3D"gmail_attr">On Wed, 26 Mar 2025 at 04:50, Jan Stary &lt;<=
a href=3D"mailto:[email protected]">[email protected]</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">&gt; This won&#39;t really wor=
k.=C2=A0 I&#39;m planning to play hundreds of tones with logic<br>
&gt; like &quot;that frequency on that channel was heard at -30dB - next ti=
me try<br>
&gt; -40dB&quot; etc. etc.<br>
<br>
That is a very flawed hearing test. Your hearing accomodates<br>
and dis-accomodates quite quickly according the the sounds<br>
heard just before. There is a reason perception tests contain<br>
breaks and intermitent music jingles. Listening to twenty<br>
half-second sine tones in sequence will very much influence<br>
your hearing of the next half-seconf sine tone.</blockquote><div><br></div>=
<div>I&#39;m not trying to do anything scientifically significant - I have =
no background knowledge to base it on.=C2=A0 It&#39;s just an experiment/le=
arning exercise.=C2=A0 That being said, I am (pseudo)randomising the tone o=
rder and ear tested.=C2=A0 I am also iterating over the test tones multiple=
 times (I&#39;m up to 45 iterations so far) with breaks in between - each i=
teration refines the result (just audible volume) for each frequency.</div>=
<div><br></div><div>In another mail you asked about the version of sox I&#3=
9;m using - I have not tried any other versions and I won&#39;t be - you ma=
y have seen in mail to someone else that I have &quot;solved&quot; my issue=
 by fading the generated tones for 0.05 of a second at each end.=C2=A0 My t=
heory is that the &quot;pops&quot; I was hearing were simply some hardware =
in my audio chain reacting to the instant volume changes.</div></div></div>

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