Sync radio audio broadcast with television video broadcast

[rcavictor]

Hello,

How can I configure audacity as a audio delay processor. While recording or not.
To sync live radio audio broadcast with the live television video broadcast.

Live sports events television broadcast usually have a 1 to 8 second delay.
My live local radio broadcast is pretty much real time of the same event.
I would like to delay the live local radio audio broadcast so it matches what is transpiring on the live television video broadcast.

I figured out how to do this with audacity but can't remember how I did it.
Kind of like turning your radio into a digital video recorder but just recording audio.
With the capability to time-shift.

Any Idea appreciated,

Vic

[steve]

"Software Playthrough" (Transport menu) routes audio from the input to the output via software, which is relatively slow and so delays the output, usually by about half a seconds, but the delay in unpredictable as it depends on the computer and the sound card and many other factors. "Software Playthrough" can not be used at the same time as recording "Stereo Mix" as that will cause a loud howl or squeal.
There is no precise method for accomplishing this task in Audacity - this is just a "quirk" that may (or may not) work for you.

[rcavictor]

"Software Playthrough" (Transport menu) routes audio from the input to the output via software, which is relatively slow and so delays the output, usually by about half a seconds, but the delay in unpredictable as it depends on the computer and the sound card and many other factors. "Software Playthrough" can not be used at the same time as recording "Stereo Mix" as that will cause a loud howl or squeal.
There is no precise method for accomplishing this task in Audacity - this is just a "quirk" that may (or may not) work for you.

What about adjusting latency.
Or pausing to sync while recording in Software Playthrough. not using "Stereo Mix"
Just an idea, I thought I able to do this by backing up audio while I was recording.
I'm missing something I did, because it wasn't that hard to be able to do.
Maybe it was a variable audio delay sync feature in the sound card.

Thanks for reply,
Vic

[kozikowski]

Latency adjusts the delay that Audacity applies to the show being written to the hard drive. It's purpose is to "tune out" the difference between your old track headphone signals and the creation of the new voice track ( assuming the voice is the new track). It doesn't appear as a live feed.

We went round and round with this at work. We ended up using an old give-away version of a much larger audio program (Bias??) and cleverly ran its delay tool in real time. I know it made my head hurt at the time we were doing this because I couldn't follow the sound pathways.

Koz

[Robert J. H.]

Latency adjusts the delay that Audacity applies to the show being written to the hard drive. It's purpose is to "tune out" the difference between your old track headphone signals and the creation of the new voice track ( assuming the voice is the new track). It doesn't appear as a live feed.

We went round and round with this at work. We ended up using an old give-away version of a much larger audio program (Bias??) and cleverly ran its delay tool in real time. I know it made my head hurt at the time we were doing this because I couldn't follow the sound pathways.
Koz

But there are two latency fields, only the second is for the latency correction.
Maybe the "Audio to Buffer" does such a delay if set to 1500 ms, haven't tested though.

[Gale Andrews]

On Windows machines I've had, "Audio to Buffer" delays playback but not doesn't delay recording.

Audio to Buffer doesn't delay playback when software playthrough is enabled, even if you are playing but not recording. Audacity uses a pre-determined buffer setting when software playthrough is enabled.

Have you tried this program http://www.daansystems.com/radiodelay/ ?


Gale

[rcavictor]

On Windows machines I've had, "Audio to Buffer" delays playback but not doesn't delay recording.
Audio to Buffer doesn't delay playback when software playthrough is enabled, even if you are playing but not recording. Audacity uses a pre-determined buffer setting when software playthrough is enabled.
Have you tried this program http://www.daansystems.com/radiodelay/ ?
Gale

Hello Gale,

I know of the above software you mentioned. Here a demo on YouTube of it http://www.youtube.com/watch?v=GwCunk26dO8
Here is another. http://www.fountainware.com/Products/Au ... /index.htm I believe they both have record feature.
I have not tried them. If I did, would I be able to record the delayed signal through Audacity.

Below are some hardware related units:
http://www.sportsyncradio.com/‎
http://www.ccrane.com/radios/radio-acce ... iEJpT_pzKc

It seems I was able to delay thru Audacity by moving the timeline somehow.
Like going into the minus 1.0 area on the timeline, but I can't recall on how to start below 0.0 mark on the timeline.

Thanks for Reply,
Vic

[kozikowski]

Minus time is a forbidden place. Sometimes special effects will push a sound track into negative time and the show may become unstable. You can push everything else later in time rather than trying to achieve earlier.

You can certainly match multiple track times up in post production with the Time Shift Tools. Audacity doesn't do well in real time.

Koz

[steve]

It seems I was able to delay thru Audacity by moving the timeline somehow.

You can do that "after the event" using the Time Shift tool.

[rcavictor]

It seems I was able to delay thru Audacity by moving the timeline somehow.

You can do that "after the event" using the Time Shift tool.

Hello Steve,

I stumbled upon this software that has the ability to Time Shift while recording.
This is what it says:The Time-shift feature enables you to listen to recorded sound while a recording is being made. While listening, you can move anywhere within the recorded part of the sound stream and start playback. This feature is available for both ordinary recordings and when background recording Internet streams.
http://www.totalrecorder.com/productfr_trPRO.htm

I do not know if this is a common feature with digital audio editors.
Certainly would come in handy.
Wonder how hard it be to implement into audacity.

Thanks