media transfer help!! -Sound Forge - PC - MAGIX Community Forums Archive

Subject:media transfer help!! Posted by: rgilmour Date:5/6/2005 7:57:07 AM Hi all, hope some kind person can shed some light on this problem: I teach music technology and one of my students recorded a project onto our Mackie SDR recorder. Unfortunately, the snare sounded rubbish (i wasn't present at the time of the recording, not guilty, your honour!) so i suggested he transfer the .wav file to the PC and replace the snare with a sampled snare. This process in itself was simple - auto region was used to identify the appropriate points and the horrible snare hits were replaced (overwritten to keep the file the same size - in theory) with some fantastic sounding snares. I told the student to be very careful not to alter the length of the file, as this would confuse the Mackie SDR when we tried to send it back where it came from. I've carried out similar processes several times and never had any trouble, but for some reason (this is where i'm hoping for some pointers) the file properties appear to have been altered in the editing process which means the Mackie doesn't like the file when i try to copy it across. My first thought was to clear the regions/playlist etc (which did reduce the size of the file to close to where it was before - but not exactly). The properties of the old and new files are as follows: old: file size 53,615,550 bytes length 00:06:12:326 (17,871,632 samples) the format tab tells me "sound data size" is 53,614,896 bytes new: file size 53,615,548 length 00:06:12:326 (17,871,631 samples) Sound data size 53,614,893 bytes So althought the length is exactly the same, i seem to have lost 2 bytes or 1 sample or 3 bytes according to the "sound data size". So - (sorry about the long winded nature of this request...) I'm hoping to find out a) what i've done wrong and where i put that data (i've even looked underneath the sofa cushions) and b) is there a way to increase the sound data size, file size and samples by the relevant amount without affecting the length? The whole thing has totally frazzled my brain for the better part of a week - i'd really appreciate if some kindly SF wizard could put me straight. Many thanks in advance, Ronnie ps the software i'm running is version 7.0a Message last edited on5/6/2005 8:01:39 AM byrgilmour.
Subject:RE: media transfer help!! Reply by: Sonic Date:5/6/2005 9:27:21 AM The time is just a representation of the number of samples. 17,871,631 / 48,000 = 372.325645833 seconds 17,871,632 / 48,000 = 372.325666667 seconds The display time is rounded to the nearest millisecond, which is why they look the same. But a millisecond is much larger than the duration of a single sample at 48 kHz (about 21 microseconds). Insert one sample of silence at the end and all will be well. J. Message last edited on5/6/2005 9:28:54 AM bySonic.
Subject:RE: media transfer help!! Reply by: rgilmour Date:5/12/2005 1:31:06 AM J, D'oh! why didn't i think of that! Many thanks - all sorted now. That's a pint i owe you. Cheers, Ronnie

Hi all, hope some kind person can shed some light on this problem:

I teach music technology and one of my students recorded a project onto our Mackie SDR recorder. Unfortunately, the snare sounded rubbish (i wasn't present at the time of the recording, not guilty, your honour!) so i suggested he transfer the .wav file to the PC and replace the snare with a sampled snare.

This process in itself was simple - auto region was used to identify the appropriate points and the horrible snare hits were replaced (overwritten to keep the file the same size - in theory) with some fantastic sounding snares. I told the student to be very careful not to alter the length of the file, as this would confuse the Mackie SDR when we tried to send it back where it came from. I've carried out similar processes several times and never had any trouble, but for some reason (this is where i'm hoping for some pointers) the file properties appear to have been altered in the editing process which means the Mackie doesn't like the file when i try to copy it across.

My first thought was to clear the regions/playlist etc (which did reduce the size of the file to close to where it was before - but not exactly). The properties of the old and new files are as follows:

old: file size 53,615,550 bytes
length 00:06:12:326 (17,871,632 samples)
the format tab tells me "sound data size" is 53,614,896 bytes

new: file size 53,615,548
length 00:06:12:326 (17,871,631 samples)
Sound data size 53,614,893 bytes

So althought the length is exactly the same, i seem to have lost 2 bytes or 1 sample or 3 bytes according to the "sound data size".

So - (sorry about the long winded nature of this request...) I'm hoping to find out a) what i've done wrong and where i put that data (i've even looked underneath the sofa cushions) and b) is there a way to increase the sound data size, file size and samples by the relevant amount without affecting the length?

The whole thing has totally frazzled my brain for the better part of a week - i'd really appreciate if some kindly SF wizard could put me straight.

Many thanks in advance,

Ronnie

ps the software i'm running is version 7.0a