Plan nominal source and target audio frame counts, rate ratio, Nyquist limits, and integer-frame duration reconciliation without uploading or converting audio.
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Plan nominal whole source and target frame counts from exact rates and duration without uploading, processing or certifying an audio file.
Predict nominal target frames before a real render.
Copy exact source metadata, entered duration and written target rate, then inspect the reduced ratio and frame boundary.
Uses an actual resampler and verifies the delivered file afterward.
Keep source/session/target rates distinct.
Run each source record against the session requirement and save nominal counts to the Project.
Does not infer that mixed-rate files were converted or are compatible from arithmetic alone.
Explain tiny duration changes without a fake file-size estimate.
Inspect source/target frame durations and the displayed millisecond difference, then review timestamps, padding and metadata.
Separates integer-frame math from filter, format, codec, loudness and quality decisions.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
This tool is part of these guided projects. Each project provides step-by-step instructions with checklists and all the tools you need in one place.
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A file contains whole sample frames. The entered duration is multiplied by the exact whole-Hz source rate and rounded once to obtain a nominal source-frame record.
Source frames = round(source rate × entered seconds)The target count is rounded from the source-frame duration at the entered target rate. A tiny displayed difference can arise because both files require whole frames.
Target frames = round((source frames / source rate) × target rate)A real sample-rate converter filters/interpolates audio and may expose precision, dither, channel layout, sample format and timestamp controls. This calculator performs none of those operations.
Nyquist frequency = sample rate / 2Updated: August 2026
Copy the source metadata, duration and written delivery rate, inspect nominal target frames, then use a real resampler and verify the delivered file.
Record each source rate before import and compare it with the session rate; let the actual editor perform conversion with documented settings.
Use the integer-frame duration difference to explain a one-frame boundary, then inspect timestamps, padding, channel count and encoded output separately.
Use a real resampler and verify filters, formats, channel layout, timestamps, metadata, artifacts and delivery acceptance.
Record channel count, sample format/bit depth, codec, container, metadata and padding before estimating bytes; this tool intentionally omits size.
Enter exact whole-Hz source and target rates plus a measured or metadata duration. The page reconciles nominal whole sample-frame counts only. Use a real resampler for signal conversion and verify its filters, formats, timestamps, metadata, artifacts and delivery requirements.