Synchronizing multiple mp3 files

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Synchronizing multiple mp3 files

Permanent link to this post Posted by jamesadrian » Fri Jul 21, 2017 10:26 pm

I would like to synchronize multiple mp3 files and have them exit the computer through separate USB ports. Is there an application that does that?

Thank you for your help.

Jim Adrian
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by kozikowski » Fri Jul 21, 2017 11:57 pm

Audacity only recognizes one device, so the best we can do is one stereo USB adapter.

However.

I don't think anybody else is going to make this work, either. MP3 files have mushy start times and you can't stop it. It's burned into the format. That and MP3 files get worse and worse quality as you edit and cut them.

That's why we stress you should never do production in MP3.

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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by jamesadrian » Sat Jul 22, 2017 12:00 am

Koz,

Thank you for this information.

Is there a better format?

Thank you for your help.

Jim Adrian
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by kozikowski » Sat Jul 22, 2017 12:30 am

Do production, filtering, cutting, etc in WAV and then convert one of the compressed formats for use. That can depend on the devices you get to do the playback. This will be a juggling act if you're starting out with download MP3 files. Then you should work and stay in WAV to keep the compression quality from getting any worse

Getting something to produced synched USB ports may be interesting. Are you asking it this way because you have a lot of USB ports available?

If it's a powerful machine, you can stay in WAV. If you have to compress for space considerations, you can use Apple AAC (M4A) format. Audacity can create those if you have the FFMpeg software installed

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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by jamesadrian » Sat Jul 22, 2017 11:13 am

I played a lot of instruments. I'm 72. I'm done with instruments. I really want to create music with a computer and a pointing device. I don't care whether the sound happens to be one that can be recognized as similar to an existing musical instrument. I would prefer (as many composers would) to be in complete control of the sound.

I think that it is time that that somebody offered software that permits the composer to construct sounds by specifying the amplitudes (coefficients) of the overtone sign waves in a strict harmonic series (integer multiples of the consciously heard pitch of the note). In writing each note, the coefficients of the sound and its loudness envelope would be specified by the composer.

The pitch of each sign wave would need to be exact integer multiples of the frequency of the pitch that is consciously heard, but these sign waves (also called partials or overtones) would not usually be even tempered because no natural sound has even-tempered overtones.

Synthesizing the acoustics of an imagined room would not be constructive if the performance is to be before an audience.

There is also a market for video background music that is not necessarily comprised of familiar sounds or natural-sounding sounds.

Ideally, the voices would be separable so that they could be sounded by different speakers individually. This does in fact eliminate intermodulation distortion and frequency modulation distortion. This is important in loud, public performances.

A perfectly general computer-aided design software package with no limitations is overdue. The resolution problems of MIDI must be overcome. MIDI should be an add-on for legacy hardware.

Can Audacity help in this effort?

Thank you for your help.

Jim Adrian
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by kozikowski » Sat Jul 22, 2017 5:21 pm

Do you have somebody you like doing anything similar?

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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by jamesadrian » Sat Jul 22, 2017 5:45 pm

Koz,

No. The writers of music notation software have not jumped at the chance to do this. I could find no software vendor that offers a thorough-going computer-aided sound design package for music and sound effects for video clips, movies, or music composition.

I would like to add a point neglected by my previous message: Frequency modulation distortion and intermodulation distortion are eliminated by separating voices into separate speakers only if these voices have overtones that are all integer multiples of the lowest partial (the one consciously heard). This is because the vibrating diaphram goes through an exact repetition of displacement each cycle. This is true of any waveform that continues to repeat exactly. This cannot be true of multiple instruments going through the same speaker and played by people.

There might be ten or twenty new styles of music and sound effects discovered or devised per century, but the future has many thousands waiting.

The physics of perception is is not entirely known to composers or even researchers. We will inevitably discover new psychological effects in serious music if we have the capabilities of computer-aided design of sound. Our idea of music will surely be extended to all emotionally useful sound. This is not just a matter of percussion, or of anything else we might have a name for.

Composers can imagine much more than they can depict with existing software.

I want to freely compose ensembles of sign waves, their envelopes, and their changing frequency relationships without any constraints not intentionally planed or devised. I want to depict seeming disorder that morphs into familiar order and seems orderly in retrospect. This is merely one of thousands of things that can be imagined. I think that many, many useful and beneficial psychological results are there to be found. It is a further exploration of consciousness.

Thank you for your help.

Jim Adrian
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by steve » Sat Jul 22, 2017 6:30 pm

jamesadrian wrote:I would like to synchronize multiple mp3 files

You can't get exact synchronisation of MP3s because the encoder/decoder delay is not defined. Most other formats (including WAV, FLAC and OGG Vorbis) don't have this problem.

jamesadrian wrote:and have them exit the computer through separate USB ports

Probably better to use hardware that is designed for the job. Although Audacity can only play as 2 channel stereo, multi-channel sound cards are readily available, including inexpensive sound cards designed for "surround sound". Audacity is able to produce multi-channel audio files even though it can only play 2 channel stereo (see: http://manual.audacityteam.org/man/adva ... tions.html)

Most DAW applications and some media players (including VLC) can play multiple audio channels if suitable hardware is present and working correctly.


jamesadrian wrote:I think that it is time that that somebody offered software that permits the composer to construct sounds by specifying the amplitudes (coefficients) of the overtone sign waves in a strict harmonic series (integer multiples of the consciously heard pitch of the note). In writing each note, the coefficients of the sound and its loudness envelope would be specified by the composer.

Such software exists, but lacks mainstream popularity because creating music in such a detailed way is incredibly arduous.

Some examples:
http://www.csounds.com/
https://cycling74.com/products/max/
http://puredata.info/
http://supercollider.github.io/
http://www.cs.cmu.edu/afs/cs.cmu.edu/pr ... tware.html

Note that this last one, the "Nyquist" programming language is included in Audacity.
See http://wiki.audacityteam.org/wiki/Nyqui ... _Reference
and: http://manual.audacityteam.org/man/nyquist_prompt.html

See also: https://en.wikipedia.org/wiki/List_of_a ... _languages
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by jamesadrian » Sat Jul 22, 2017 6:53 pm

Steve,

Thank you for this information:

Some examples:
http://www.csounds.com/
https://cycling74.com/products/max/
http://puredata.info/
http://supercollider.github.io/
http://www.cs.cmu.edu/afs/cs.cmu.edu/pr ... tware.html

Regarding your comment

"Such software exists, but lacks mainstream popularity because creating music in such a detailed way is incredibly arduous."

It need not be arduous. Software design and algorithms have not yet competed much yet on this front.

I am confident that all such problems can be solved handily.

Jim Adrian
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Re: Synchronizing multiple mp3 files

Permanent link to this post Posted by cyrano » Sat Jul 22, 2017 7:19 pm

jamesadrian wrote:I think that it is time that that somebody offered software that permits the composer to construct sounds by specifying the amplitudes (coefficients) of the overtone sign waves in a strict harmonic series (integer multiples of the consciously heard pitch of the note). In writing each note, the coefficients of the sound and its loudness envelope would be specified by the composer.


You could have a look at Sonic Pi, a synth run by code. Available for the Raspberry Pi, Mac and Windows. Free and lots of fun:

http://sonic-pi.net/

Some use it to teach coding to youngsters that have more interest for music.
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