Check this out -- really good discussion of bits and SNR: https://www.xiph.org/video/vid2.shtml https://www.xiph.org/video/vid2.shtml jump to the 11:00 mark

Check this out -- really good discussion of bits and SNR: https://www.xiph.org/video/vid2.shtml https://www.xiph.org/video/vid2.shtml jump to the 11:00 mark to find out just how many 'equivalent bits' those old cassette 'mix tapes' of yours had...