MOF wrote:Apple are now asking for the highest bit and sample rate files: “Use High-Resolution Sources.
To take best advantage of our latest encoders, use only 24-bit sources and send us the highest-resolution master file possible, appropriate to the medium and the project. Don’t upsample files to a higher resolution than their original format. Upsampling won’t recover or add information to an audio file. Similarly, don’t “bit-pad” or recapture 16-bit files in 24-bit.
Provide High-Resolution Masters.
Some mastering engineers prefer to control the SRC process by sending already converted files, however we ask that you deliver the highest native sample rate available. As technology advances and bandwidth, storage, battery life, and processor power increase, keeping the highest-resolution masters available in our systems allows for full advantage of future improvements to your or your client’s music”.
Interesting! I think there is a moral problem here about creating hires masters when the samples used are not hires. So for example, if the OP is creating a solo piano piece using Garritan CFX sampled at 44.1kHz, should the masters be released at 96kHz? I would say no, as that suggests the recording was made at that frequency.