I don't want to damage the original, and I want to save it in the same state as the original source as much as possible. (However, I don't want the file to be large.)

Special Interest Groups Audio Technology
1

I downloaded audacity in the same way, but unlike what I saw in other videos, the ‘Hz and bit’ values ​​of the audio file I loaded are not visible. How can I check it, and how can I extract the file in the same state as the original source file? (The reason I want the same state when extracting is because I think it will be closest to the original, and I think it will have the smallest file size when saved.)

  • ps. I originally tried to do this using Logic Pro, but I cut the 2MB file into parts and was surprised that it extracted to 10MB, which is larger than the original’s total file size (2MB).
    Thank You~
2

Yu can check the original file with MediaInfoOnline (or you can install MediaInfo on your computer).

Internally, Audacity uses 32-bit floating-point PCM at the same sample rate as the original. If your original is lossless, the conversion, and conversion-back, is lossless.

If your original is in a lossy compression format (MP3, etc.) there is some theoretical quality loss with if you compress again when exporting.

For uncompressed audio file size is easily calculated as long as you know there are 8-bits in a byte. For example, CD audio is 16-bits, 44.1kHz, 2-channel stereo:

(16 bits/8) x 44.1K x 2 channels = 176kB per second (which is about 10MB per minute).