Hi. I was wondering if there was any interest in extending the flac container format to support sample rates above the 655k current limit. Please note this is not for using ridiculously high sample rate sourced audio for some imaginary audible benefit. I've been involved in some experimentation with offline upsampling in software prior to delivery to an external DAC as a way to bypass the DAC's internal oversampling and found that wavpak is the only compressed container format that supports the 705/768 sample rates but it is very poorly supported and extremely slow during decompression, and fully uncompressed WAV data is extremely cumbersome. Most DACs do appear to turn off their anti-aliasing filters at sample rates above 192kHz so 384 may well be the limit of any theoretical benefit, but many DACs now support input up to 768kHz (a very small number support even higher.) Studio ADCs often record in the Mhz range, and although they apparently always decimate as they sample, there may be a theoretical use for the data as is. It would be nice if the flac container was extensible to any arbitrary value for research purposes.
Thanks, -ck _______________________________________________ flac-dev mailing list flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev
