Sample Rate Conversion Calculator

The Quality Score is defined purely as target Nyquist divided by source Nyquist, capped at 100 — it's a measure of whether you're preserving or discarding frequency headroom, not a measure of added fidelity. Once the target Nyquist is greater than or equal to the source Nyquist (any upsample or same-rate conversion), that ratio hits or exceeds 1, so the score caps at 100 even though upsampling only interpolates new samples between existing ones rather than capturing any real detail that wasn't already there.

Frequency Loss here is computed strictly as the gap between the source and target Nyquist frequencies, so it reports the theoretical ceiling that gets clipped regardless of human hearing limits. It's shown as a technical fact about the conversion — useful for archival or mastering-source decisions where you might want to preserve ultrasonic content for future processing — even though the audible impact for most listeners at typical rates is minimal.

No — bit depth only feeds into the file size calculations (source and target size in MB), since it's part of the bytes-per-sample term in that formula. Frequency Loss and Quality Score are both derived exclusively from the source and target sample rates via their Nyquist frequencies, so changing bit depth alone won't move either of those two results.

With source and target sample rates equal, both Nyquist frequencies match, so Frequency Loss computes to zero and Quality Score computes to exactly 100 since the target-to-source Nyquist ratio is 1. File size for source and target will also be identical, since size depends only on sample rate, bit depth, duration, and channel count — none of which changed.