Sony TRV27 audio question

scim wrote on 10/20/2002, 1:00 PM

Hi,

I was wondering if the audio rate for imported clips should be higher than 32Hz. For all transfers so far this is the rate it's captured as.

Here is the version that I am using : 3.0c build 318.

TIA for any info and if more details are needed I would be more than happy to provide them.

scim

Comments

salad wrote on 10/20/2002, 1:38 PM

It is capturing at 32KHz because this is how your camera recorded it.
You can go into your DV cam's MENU and look for the option of selecting 32KHz or 48KHz.
There's nothing you can set in Vidcap to change the way it captures DV audio, other than to have it NOT capture audio. So, once it's recorded on your camera at 32KHz, then it must be captured at 32KHz. Not a big deal if the audio is recorded from the onboard mic.....
I usually have video clips and .wav files on the timeline with 32, 48, and 44.1 KHz.
When you go to render you can select the default NTSC DV template, which will have 48KHz as the audio sample rate. It'll work out fine.

scim wrote on 10/20/2002, 3:07 PM

Thank you for the info Salad... I wasnt sure at what rate this camera was recording audio and just wanted to know if 32Khz was normal(it was from the onboard mic). The specs/docs for the camera didnt provide any insight regarding audio quality so I was wondering what it should be. So I presume 32Lhz is the standard for most DV cameras.

Thanks
scim

wcoxe1 wrote on 10/20/2002, 4:00 PM

Many of the Sony camcorders allow you to change responses. If you pick 32KHz you are using one of two available tracks on the tape. That allows another if you want to overdub onto the second track.

However, if you go into the menu and choose 48KHz, you are using all you can, and have only that one track. This is no big deal if you don't overdub. You will get better sound if you select 48KHz. High pitched sounds, including female voices, music, bird song, etc., sound better.

So, check and see if your camcorder allows you to select between the two options. Sometimes it is labeled 12 bit (32KHz) vs. 16 bit (48KHz). I may be wrong on those bit numbers, mine is labeled in KHz. But, the higher the bit rate the higher the KHz (Kilo Hertz or Thousands of Cycles per Second).

salad wrote on 10/20/2002, 6:22 PM

Thanks wcoxe1,
Actually, it is labeled 12 & 16 bit on my Sony. I use 16 bit, and my vid cap's are at 48KHz @ 16 bit. If I set to 12 bit, my cap's are 32KHz @ 16 bit. I never see 12 bit captures, but like you said, you need to select 12 bit to do any dubbing etc.

The audio sounds pretty good set at 12 bit(I mean, 32 KHz ;-)

wcoxe1 wrote on 10/20/2002, 7:05 PM

Just a note to make sure you understand. If you pick 12 bit on the camcorder, you can use the camcorder to add an addition track. However, if you are using VV you don't need to sacrifice the 16 bit clarity. You have an INFINITE number of audio tracks inside VV, so you might as well stay with the better 16 bit recording on the original tape. It is easier to add audio in VV anyway.

The difference is that at 12 bit, 32KHz sampling, you have a maximum of 16KHz audio. However, using 48KHz you have a maximum of 24KHz, or very HiFi.