Yes — drop a folder of AMR files in and we process them in parallel. Premium has more parallel workers and no per-file size cap, so a 500-file batch finishes in minutes rather than tens of minutes.
Will the M4A keep the same sample rate as AMR?
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默认为是 - 48 kHz AMR 在 M4A 中保留 48 kHz。 如果您需要降低兼容性样本( 96 kHz 44.1 kHz 用于 CD 燃烧), 试样率选项将在同一编码通行证中应用高质量的重印。
Same-codec re-mux: 10 to 30 seconds. Re-encode to a different codec: typically 10 to 20% of source duration, so a 1-hour AMR → M4A finishes in 6 to 12 minutes. Batch jobs parallelize across workers for further speedups.
Why is the M4A louder or quieter than the AMR source?