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Mutlu
by Gary E. Andrews - 04/15/24 07:08 PM
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Joined: Jul 2005
Posts: 3
Casual Observer
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OP
Casual Observer
Joined: Jul 2005
Posts: 3 |
-------------------------------------------------------------------------------- Hi all,
I am asked to do recording with one single microphone but with 2 different criteria. Essentially, my task is to record the microphone at 8-bit and 11.025kHz for on the fly internet transimission purpose. At the same time, it's also crucial to record through the same microphone at 16-bit and 22.05kHz on the local machine for another purpose.
Since each recording can be done with single channel (or mono mode), so I guess it's theoretically feasible to record the microphone the way described above. So my questions are
1) is my guess correct? (that we can indeed do the recording as the way mentioned above)
2) If answer to the above question is yes, what are the procedures for doing it properly?
Thanks for all the help in advance,
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Joined: Mar 2002
Posts: 2,096
Top 100 Poster
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Top 100 Poster
Joined: Mar 2002
Posts: 2,096 |
1) yes
2) use a mixer and route one output to one recorder and another output to the second recorder. You can adjust the levels separately.
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Joined: Oct 2001
Posts: 737
Serious Contributor
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Serious Contributor
Joined: Oct 2001
Posts: 737 |
Hmmm, I would have went with,
1) No, I have never heard of a sound card, or computer that can do this.
2) Record at the 16 bit rate, then dither down to the 8 bit rate.
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Joined: Mar 2002
Posts: 2,096
Top 100 Poster
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Top 100 Poster
Joined: Mar 2002
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Hmmm. I guess you are asking if it can be done with ONE COMPUTER. In that case, I don't know how, unless you could have two sound cards functioning at the same time, one recording 8-bit and the other recording 16-bit. I don't think that is possible.
But with two computers, you could do it.
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Joined: May 2001
Posts: 13,618
Top 10 Poster
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Top 10 Poster
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I think Kaboom has got it. Record at the 16 and save the file. Then do the save as thing with the same recording and alter the rates to what you want. Should work. If it is for streaming and download or burn, why not just convert the wav to two differant mp3 rates to suit ya needs? Graham ------------------ http://www.soundclick.com/bands/2/grahamhenderson_music.htm
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Joined: Nov 2002
Posts: 1,265
Serious Contributor
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Serious Contributor
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You are doing, essentially, a live net broadcast at 8 bit while simultaneously recording to hard drive at 16 bit??? One computer, two sound cards, input signals split via the mixer should work with one card set at the 8bit, 11.025kHz rate for the live stream and the other card set to 16bit, 22.05KHz rate for the record to HD. You do have lots of RAM and a fast processor? ------------------ DakLander [This message has been edited by daklander (edited 07-13-2005).]
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Joined: Jul 2005
Posts: 3
Casual Observer
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Casual Observer
Joined: Jul 2005
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Thaks for all the hlep, guys.
daklander re-stated my situation concisely. I did think about the possibility of recording at 16-bit and 22kHz then dither it down to the lower quality. However, since it is actually a live conversation that is going to be transmitted over the net; the timing of all these conversion processs (from high quality to low quality) is really critical.
Do anyone knows how does the conversion work exactly? I suppose if I would like to go from 22kHz to 11kHz, I simply transmit one out every two sampled data. But how do I correctly transform the bits from 16 to 8? and how much time it's gonna take roughly?
All the inputs so far are really appreciated,
thanks a lot, guys
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Joined: Jul 2005
Posts: 3
Casual Observer
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Casual Observer
Joined: Jul 2005
Posts: 3 |
oh, I just would like to mention one thing.
Graham mentioend about save the recording on the HD first then convert the file. However, I need a live transmission or broadcase; therefore, this idea is probably not feasible.
As for the conversion process I mentioned in the earlier post, I do mean a conversion on the fly while the recording is going on.
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