convert to mp3 mono

[javismiles]

good day, i read this
"If you use MP3 encoding, you cannot change .numChannels from default (current MP3 encoder supports 2-channel stereo only)."

in my case i need to convert microphone input to Mono Mp3, how could i change the code to allow for that?
thank you so much

[higuma]

Hi Javier,
Sorry for late for answer.

MP3 encoder uses LAME MP3 library. As original LAME is written in C, I have made a JavaScript library for web browsers using C-to-JavaScript converter.

https://github.com/higuma/mp3-lame-encoder-js

LAME is mostly made for Hi-Fi audio. It is not difficult to setup LAME for 2-ch stereo. But It needs special configuration for mono. In fact (to tell you honestly), I do not know how to configure to mono correctly (I tried but could not). Please see the following issue.

higuma/mp3-lame-encoder-js#1

Numbers of people have tried to make LAME JavaScript encoder with mono. I have checked some of them a few month ago (from May to July). But I found none of them was successful.

If you can use another encoding than MP3, Ogg Vorbis is easier. You can set numChannels to 1.

[javismiles]

Dear Higuma, thank you for your reply , i have to say i have found a few people using Lame to export Mono MP3 with no problems, i will post the links here soon, so i dont think that's a problem really

[javismiles]

here you have it
https://github.com/zhuker/lamejs
can export to mono 1 channel and it works well

[javismiles]

Blixt also exports with lame to mono 1 channel
https://github.com/blixt/js-lameworker

[javismiles]

so those two libraries above use Lame to export to 1 channel mono successfully,
would be awesome if you could add it to yours as well this capability yeah

[higuma]

Thank you for your nice imformation. I will check them later.
Anyway, using these libraries is probabry better for you.
I want to improve my library also, but not now...

[javismiles]

in many ways your library is better and more complete than the others,
but the others have 1 or 2 things that are missing in yours, ideal world
would be mixture of both :))
best my friend
:)

Javier ideami
Ideami Studios
San Francisco / Barcelona
+1 408 634 9071
http://torchprinciple.com
http://ideami.com
http://posterini.com
http://incredivid.com
http://torchprinciple.com

On Thu, Oct 15, 2015 at 3:40 AM, Yuji Miyane [email protected]
wrote:

Thank you for your nice imformation. I will check them later.
Anyway, using these libraries is probabry better for you.
I want to improve my library also, but not now...

—
Reply to this email directly or view it on GitHub
#3 (comment)
.

[higuma]

Thank you Javier.
I apologize that I closed this issue.
I really want to improve my library. But I have no time for it now.
(Hence my reply is alwayes late, but your responce is always very quick)
When I find time and manage to make improvement, I let you know.

Best regards,
Yuji

2015-10-15 21:17 GMT+09:00 Javier [email protected]:

in many ways your library is better and more complete than the others,
but the others have 1 or 2 things that are missing in yours, ideal world
would be mixture of both :))
best my friend
:)

Javier ideami
Ideami Studios
San Francisco / Barcelona
+1 408 634 9071
http://torchprinciple.com
http://ideami.com
http://posterini.com
http://incredivid.com
http://torchprinciple.com

On Thu, Oct 15, 2015 at 3:40 AM, Yuji Miyane [email protected]
wrote:

Thank you for your nice imformation. I will check them later.
Anyway, using these libraries is probabry better for you.
I want to improve my library also, but not now...

—
Reply to this email directly or view it on GitHub
<
#3 (comment)

.

—
Reply to this email directly or view it on GitHub
#3 (comment)
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[javismiles]

thank you Yuji,
your monitoring feedback issue may be related to this
mattdiamond/Recorderjs#45

Javier ideami
Ideami Studios
San Francisco / Barcelona
+1 408 634 9071
http://torchprinciple.com
http://ideami.com
http://posterini.com
http://incredivid.com
http://torchprinciple.com

On Thu, Oct 15, 2015 at 6:04 AM, Yuji Miyane [email protected]
wrote:

Thank you Javier.
I apologize that I closed this issue.
I really want to improve my library. But I have no time for it now.
(Hence my reply is alwayes late, but your responce is always very quick)
When I find time and manage to make improvement, I let you know.

Best regards,
Yuji

2015-10-15 21:17 GMT+09:00 Javier [email protected]:

in many ways your library is better and more complete than the others,
but the others have 1 or 2 things that are missing in yours, ideal world
would be mixture of both :))
best my friend
:)

Javier ideami
Ideami Studios
San Francisco / Barcelona
+1 408 634 9071
http://torchprinciple.com
http://ideami.com
http://posterini.com
http://incredivid.com
http://torchprinciple.com

On Thu, Oct 15, 2015 at 3:40 AM, Yuji Miyane [email protected]
wrote:

Thank you for your nice imformation. I will check them later.
Anyway, using these libraries is probabry better for you.
I want to improve my library also, but not now...

—
Reply to this email directly or view it on GitHub
<

#3 (comment)

.

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Reply to this email directly or view it on GitHub
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#3 (comment)

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