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* Sox’s Noisered Algorithm - What is it doing exactly?
@ 2017-08-29  0:35 Michael Padilla
  2017-08-29  6:16 ` Peter P.
  0 siblings, 1 reply; 3+ messages in thread
From: Michael Padilla @ 2017-08-29  0:35 UTC (permalink / raw)
  To: sox-users

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Hi All,

I’m exploring Sox for the purpose of reducing background noise from
recordings of people speaking. For my project this will be required for a
large number of files so being able to automate this task via the command
line is a huge plus and it seems that Sox accommodates this.

However, I’ve compared some initial experiments of what Sox’s Noisered can
do to Audacity’s Noise Reduction effect and so far it seems that Audacity
is perhaps a bit more effective. That said, I still need to play around
with Sox more before I can draw any conclusions.

I’ve looked online and in the mailing list archives and haven’t been able
to find any documentation/explanations of what exactly Sox’s Noisered
algorithm is doing….does anyone have an understanding of this, or have a
reference that they could please refer me to? I’m assuming that it’s some
version of spectral subtraction of course, but the devil is in the details
and it would be great to be able to understand what Sox is doing beyond
just a high-level description.

Any help would be greatly appreciated!

Thank you. Best,
Michael

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<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap:break-word"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Hi All,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">I’m exploring Sox for the purpose of reducing background noise from recordings of people speaking. For my project this will be required for a large number of files so being able to automate this task via the command line is a huge plus and it seems that Sox accommodates this.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">However, I’ve compared some initial experiments of what Sox’s Noisered can do to Audacity’s Noise Reduction effect and so far it seems that Audacity is perhaps a bit more effective. That said, I still need to play around with Sox more before I can draw any conclusions.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">I’ve looked online and in the mailing list archives and haven’t been able to find any documentation/explanations of what exactly Sox’s Noisered algorithm is doing….does anyone have an understanding of this, or have a reference that they could please refer me to? I’m assuming that it’s some version of spectral subtraction of course, but the devil is in the details and it would be great to be able to understand what Sox is doing beyond just a high-level description.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Any help would be greatly appreciated!</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Thank you. Best,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Michael</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div></body></html>

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* Re: Sox’s Noisered Algorithm - What is it doing exactly?
  2017-08-29  0:35 Sox’s Noisered Algorithm - What is it doing exactly? Michael Padilla
@ 2017-08-29  6:16 ` Peter P.
  2017-08-30  6:41   ` Michael Padilla
  0 siblings, 1 reply; 3+ messages in thread
From: Peter P. @ 2017-08-29  6:16 UTC (permalink / raw)
  To: sox-users

* Michael Padilla <miketpadilla@gmail.com> [2017-08-29 02:35]:
> Hi All,
> 
> I’m exploring Sox for the purpose of reducing background noise from
> recordings of people speaking. For my project this will be required for a
> large number of files so being able to automate this task via the command
> line is a huge plus and it seems that Sox accommodates this.
Slightly off-topic, but perhaps this online service is of help for your
task: https://auphonic.com/ especially 
https://auphonic.com/help/algorithms/singletrack.html#noise-and-hiss-reduction

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* Re: Sox’s Noisered Algorithm - What is it doing exactly?
  2017-08-29  6:16 ` Peter P.
@ 2017-08-30  6:41   ` Michael Padilla
  0 siblings, 0 replies; 3+ messages in thread
From: Michael Padilla @ 2017-08-30  6:41 UTC (permalink / raw)
  To: Peter P., sox-users

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I’ll definitely take a look…thank you!!

Best,
Michael

On August 28, 2017 at 11:16:52 PM, Peter P. (peterparker@fastmail.com)
wrote:

* Michael Padilla <miketpadilla@gmail.com> [2017-08-29 02:35]:
> Hi All,
>
> I’m exploring Sox for the purpose of reducing background noise from
> recordings of people speaking. For my project this will be required for a
> large number of files so being able to automate this task via the command
> line is a huge plus and it seems that Sox accommodates this.
Slightly off-topic, but perhaps this online service is of help for your
task: https://auphonic.com/ especially
https://auphonic.com/help/algorithms/singletrack.html#noise-and-hiss-reduction

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[-- Attachment #1.2: Type: text/html, Size: 2382 bytes --]

<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap:break-word"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">I’ll definitely take a look…thank you!!</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Best,</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px;color:rgba(0,0,0,1.0);margin:0px;line-height:auto">Michael</div> <div id="bloop_sign_1504075220255454976" class="bloop_sign"></div> <br><p class="airmail_on">On August 28, 2017 at 11:16:52 PM, Peter P. (<a href="mailto:peterparker@fastmail.com">peterparker@fastmail.com</a>) wrote:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>* Michael Padilla &lt;<a href="mailto:miketpadilla@gmail.com">miketpadilla@gmail.com</a>&gt; [2017-08-29 02:35]:<br>&gt; Hi All,<br>&gt; <br>&gt; I’m exploring Sox for the purpose of reducing background noise from<br>&gt; recordings of people speaking. For my project this will be required for a<br>&gt; large number of files so being able to automate this task via the command<br>&gt; line is a huge plus and it seems that Sox accommodates this.<br>Slightly off-topic, but perhaps this online service is of help for your<br>task: <a href="https://auphonic.com/">https://auphonic.com/</a> especially <br><a href="https://auphonic.com/help/algorithms/singletrack.html#noise-and-hiss-reduction">https://auphonic.com/help/algorithms/singletrack.html#noise-and-hiss-reduction</a><br><br>------------------------------------------------------------------------------<br>Check out the vibrant tech community on one of the world&#39;s most<br>engaging tech sites, Slashdot.org! <a href="http://sdm.link/slashdot">http://sdm.link/slashdot</a><br>_______________________________________________<br>Sox-users mailing list<br><a href="mailto:Sox-users@lists.sourceforge.net">Sox-users@lists.sourceforge.net</a><br><a href="https://lists.sourceforge.net/lists/listinfo/sox-users">https://lists.sourceforge.net/lists/listinfo/sox-users</a><br></div></div></span></blockquote></body></html>

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2017-08-29  0:35 Sox’s Noisered Algorithm - What is it doing exactly? Michael Padilla
2017-08-29  6:16 ` Peter P.
2017-08-30  6:41   ` Michael Padilla

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