I've been thinking of upsampling my 44.1kHz collection to 88.2, 176.4kHz, 352.8, or even 705.6kHz for playback...
We're all familiar with the noise being filtered above 22.05kHz when it's being rendered by a DAC. Depending on the filter you choose, you can eliminate (effectively) all of it, or, you can allow the rendering artifacts above 22.05kHz up to about 28kHz, variously attenuated as illustrated above.
I assume that when you convert a 44.1kHz file to 88.2kHz, observing the output with a spectrum analyzer there would be effectively no energy between 22.05 and 44.1kHz. And likewise, when the new rate is 705.6kHz, there's no energy between 22.05kHz and 352.8kHz...
Although my amplifier is flat past 100kHz and I don't know where its rolloff begins, I do know my DAC's -3dB point should be somewhere between 70 and 75kHz (from its 40kHz being spec being -1dB SE, 0.8dB BAL), so whatever might come out of it above 352kHz (or even 176), is probably pretty attenuated.
Is this a good idea to resample my files? Something I'd really like to be able to do is apply the slowest 88.2kHz filter when a resampled 705.6kHz file is being played back... But, alas, that's impossible with my DAC (and most DACs... but that's no consolation!)
\Thoughts?
Also, has anyone else contemplated using slower filters designed for half the sample rate of a high sample rate file (ie. >= 88.2kHz) for playback?
We're all familiar with the noise being filtered above 22.05kHz when it's being rendered by a DAC. Depending on the filter you choose, you can eliminate (effectively) all of it, or, you can allow the rendering artifacts above 22.05kHz up to about 28kHz, variously attenuated as illustrated above.
I assume that when you convert a 44.1kHz file to 88.2kHz, observing the output with a spectrum analyzer there would be effectively no energy between 22.05 and 44.1kHz. And likewise, when the new rate is 705.6kHz, there's no energy between 22.05kHz and 352.8kHz...
Although my amplifier is flat past 100kHz and I don't know where its rolloff begins, I do know my DAC's -3dB point should be somewhere between 70 and 75kHz (from its 40kHz being spec being -1dB SE, 0.8dB BAL), so whatever might come out of it above 352kHz (or even 176), is probably pretty attenuated.
Is this a good idea to resample my files? Something I'd really like to be able to do is apply the slowest 88.2kHz filter when a resampled 705.6kHz file is being played back... But, alas, that's impossible with my DAC (and most DACs... but that's no consolation!)
\Thoughts?
Also, has anyone else contemplated using slower filters designed for half the sample rate of a high sample rate file (ie. >= 88.2kHz) for playback?