On 07/03/2014 06:28 AM, jdd wrote:
the two systems are very different. What limits the cd is frequency of digitalisation (sorry forget the english word), in vinyls it's the needle size and cinetic
CD frequency is limited by the sampling frequency, which must be at least 2x the highest audio frequency. There is also the low pass filters to keep the audio below 1/2 the sample frequency, but done properly, that's not significant, especially when oversampling is used. With oversampling, the sample frequency is some multiple of 44 KHz, so that the audio must be below 1/2 that frequency. With 88 KHz, frequencies well above 22 KHz can recorded, but are then removed before creating the CD master. This results in what's referred to as a "brick wall" filter, where there's little roll off below 22 KHz, but total removal at 22 KHz and above. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org