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Downsampling to 10Hz


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Hey guys,

I need to batch process a bunch of files to 10Hz. Yes, down to 10Hz. I generally use Sound Forge to do this, but it can only go down to 2000Hz. Cool Edit I believe can do it but not as a batch process and I have way too many to do one at a time. CAn someone please shed some light on this for me and give me a clue.

 

Thanks in advance,

Chris Groegler

Sound Designer,

Red Storm Entertainment

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Originally posted by Groeg:

Hey guys,

I need to batch process a bunch of files to 10Hz. Yes, down to 10Hz. I generally use Sound Forge to do this, but it can only go down to 2000Hz. Cool Edit I believe can do it but not as a batch process and I have way too many to do one at a time. CAn someone please shed some light on this for me and give me a clue.

 

Thanks in advance,

Chris Groegler

Cool Edit can do it, and can do it with Batch mode.

 

I'm curious... What kind of data is this?

 

A couple of things I can think of in this freq. range would be biometrics (EEG, EMG, EKG waveforms), industrial process variables (for example, the temperature of 20 tons of steel won't be changing very quickly!) or (as somebody mentioned) seismological data.

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  • 2 weeks later...

Hey thanks for the responses. :thu:

 

I only need to see the peaks in the audio and will not be using these files to play the audio. I recorded some VO's and need to sync animations up with them and the files need to be 10Hz. Sorry I can't give any more details, but that's all I was given......doing some work on the side.

 

It looks like they will be playing two files at the same time. A 16bit 48kHz file (or something around there) and a 10Hz file and using the 48k file to play the audio while using the 10Hz file for the syncing.

 

One more question...... Can the new Abode Audition do it or do I need Cool Edit? Do they still sell Cool Edit?

 

Thanks again,

Chris Groegler

Sound Designer,

Red Storm Entertainment

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Cool Edit is no longer for sale.

Adobe Audition SHOULD be able to do it, but I haven't personally checked it range of sample rates nor whether its features have been trimmed to make room for new features...

 

(Adobe stuff is always prone to 'feature-bloat' so even simple programs from them end up at 100 MB each)

 

Anybody out there with A. Audition that can check to see if the sample rate will go to 10 Hz?

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behold! - the nerdy splendor that is Adobe Audition.

 

Filename: 10hzexperiment.WAV

Folder: C:\...\Audio\NEW

File Type: 10Hz, 16-bit, Mono

Uncompressed Size: 562 bytes

File Format: Windows PCM

24-bit Packed Int (type 1 (24-bit))

Size on Disk: 3.53 MB (3,709,702.00 bytes)

Last Written (local): 6/14/2004 16:28:19.296

Length: 0:28.150 281 samples

 

sample conversion dialog

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Spokenward you da man. Thanks a bunch for looking into that. I'm going to place my order today!!!! How is the rest of the software? I'm used to using Sound Forge for all my 2 track editing. Does the feature set match up in real world use??

Thanks for any more info.

 

Chris Groegler

Sound Designer,

Red Storm Entertainment

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Opinions vary, of course, but I've always found the feature set of CoolPro/Audition beats the pants off of Soundforge.

 

The *only* thing Soundforge has that I'd like in Cooledit is a feature that records into a new window (i.e., into a separate WAV file) each time you hit stop & record. This allows breaking up long performances into smaller, serial-numbered chunks.

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Most of my work has been in SoundForge, but Audition is a very nice tool. I have it customized with a controller key set for editing. see this thread:

$25 DAW controller

 

The big difference for me is that Sound Forge is very drag and drop oriented. Audition is very static and "sculptural" if that makes any sense.

 

By the way, although it claims to do a 10Hz file, I have no way of determining if that file is any good. The waveform does not draw, and my sound drivers are too smart to fall for a file like that. The odd file size reported above represents the size of the file that was converted.

 

My only disappointment about Audition 1.5 is the lack of ASIO drivers (still).

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