Recording on Audicity plyays back off freq

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  • Updated 9 months ago
When I record and play back on air from Audicity, it plays back off freq.
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Bill -VA3WTB

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Posted 9 months ago

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Mike Hoing

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That really shouldn't be possible. Check you tx offset and make sure it is set to Zero or off.


I have done that before and wondered why people were responding to me off frequency


Mike

N9DFD
(Edited)
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Bill -VA3WTB

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yea it don't get it,,I think I will record from the Flex then save to file and play it back,,to see if is is recording off freq or just playing back that way.
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Mike Hoing

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What software are you using to playback from I assume a logger with a voice keyer
(Edited)
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Bill -VA3WTB

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I am recording from Flex to audacity,,play back in dax to transmit
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Ken - NM9P, Elmer

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Bill, are you hearing the frequency difference in your monitor, too? Or just getting reports from others who are listening?  

Possible things to check:

1) RIT/XIT not zeroed?

2) A function in Audacity that is shifting your audio (speedup/speed down, temp shifting, etc.)

3) A calibration error in the Flex.  (not likely, but anything is possible.)

4) a filtering difference (RX filter different from the TX filter bandwidth) which is causing the fidelity to shift between the received and re-transmitted signals.  This is often confused as "You are off frequency" by some listeners, because there isn't as much bass as the original signal, etc...)

When recording via DAX & Audacity and then playing it back through DAX TX Audio, the recorded audio is processed, filtered, and EQ'd in the same way that your live mic is processed.  If you are recording a received station with DAX and playing it back, the will hear a processed version of their their own (possibly already processed) signal.  It will not sound just like it sounds on your receiver.

On the other hand, using the SSDR Record and playback feature, as far as I know, the recorded received signal is not processed, but is still subject to the TX filter limitations.  

Ken - NM9P
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Rich McCabe

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^^^ agree with #2. I have seen several audio player glitches where the player does not play back at exact speed.   Try recording direct into Audacity and leave radio out.