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Pausing audio playback
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Mac Elite
Join Date: Sep 2000
Location: Edmond, OK USA
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Is there a way to "pause" audio playback so that what is currently playing will continue to play? I am trying to transribe some music, and rather than keep looping over a second of music I would rather freeze a chord and listen to it. Is that too much? I can't find any obvious way to get Quicktime or iTunes do it. What I want is like an audio VCR - when you pause a VCR you can watch one frame of the video without resuming playback.
In the old days there were tape devices that could playback audio at variable speeds, allowing easier transcription. Is there any way to slow audio down?
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Professional Poster
Join Date: Jan 2003
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Mac Elite
Join Date: Sep 2000
Location: Edmond, OK USA
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Thanks for the pointer - that program looks very useful. It does become difficult to determine which pitches are actually sounding when the audio is slowed since it starts to sound mechanical - but that is better than nothing. I was really hoping for a way to suspend the sound coming from the speakers at any instant in time.
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Dedicated MacNNer
Join Date: May 2004
Location: Champaign, IL
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Originally posted by absmiths:
Thanks for the pointer - that program looks very useful. It does become difficult to determine which pitches are actually sounding when the audio is slowed since it starts to sound mechanical - but that is better than nothing. I was really hoping for a way to suspend the sound coming from the speakers at any instant in time.
I have never heard of anything that can keep playing the clip of sound where you paused. I can't imagine that even being possible with a CD, but I would think it could be done with an MP3.
And, HERE is another slow down audio program:
-Ryan
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800mhz 15" Flat Panel iMac G4, 32mb GeForce2MX, OS X (10.3), Maxtor 120gb & 250gb FireWire HDs, FireWire Zip 250, iSight
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Professional Poster
Join Date: Jan 2003
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Originally posted by Ryan Becker:
I have never heard of anything that can keep playing the clip of sound where you paused. I can't imagine that even being possible with a CD, but I would think it could be done with an MP3.
There's no reason why it can't be done with a CD.
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Dedicated MacNNer
Join Date: May 2004
Location: Champaign, IL
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Originally posted by f1000:
There's no reason why it can't be done with a CD.
Okay then, explain to me how it would be done! Do you know how CDs work?
-Ryan
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800mhz 15" Flat Panel iMac G4, 32mb GeForce2MX, OS X (10.3), Maxtor 120gb & 250gb FireWire HDs, FireWire Zip 250, iSight
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Professional Poster
Join Date: Jan 2003
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I’m not sure why you think there’s an inherent difference in how MP3’s are converted into audio versus how CD’s are (other than the fact that data from the former must be decompressed before being sent to a D/A converter).
Here’s my design for an algorithm that freezes the last note during playback of a digital audio file. When a user freezes audio playback, the algorithm:
1. Selects the last 10 ms worth of samples (8.6 KB) for analysis
2. Does a Fourier analysis of the component frequencies in the data.
3. Uses waveform synthesis to emit pure tone representations of these frequencies.
Waveform synthesis avoids the annoying mechanical ‘beat’ caused by looping short audio samples.
(Last edited by f1000; May 15, 2004 at 10:37 AM.
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