A lossy M4R is encoded at 192 kbps by default. The Audio Quality setting also offers 320 kbps for the best quality and 128 kbps for a smaller file. A lossless M4R (WAV, FLAC) ignores the bitrate and keeps every sample.
Би MP3-ээс M4R-д дууны чанараа хэвийн болгох боломжтой юу?
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Not in this step. The converter has no loudness setting and leaves the level as it is. To even out the volume, run the finished M4R through a Normalize tool on this site.