Convert GSM to MP2

Turn GSM recordings into MP2. Re-encoded as MPEG-1 Audio Layer II at 192 kbit/s or the allowed rate nearest audio.bitrate and at 32, 44.1 or 48 kHz in mono or stereo, unless audio.sample_rate or audio.channels say otherwise, which loses a little more than the GSM already did.

Converted in an isolated sandbox on our serversDeleted after 24 hours

Drop GSM files on the dialor turn it to pick what to do

GSM and MP2

From

GSM Audio

GSM 06.10 audio from telephony.

Extensions: .gsm
MIME type: audio/x-gsm
Kind: Audio

To

MP2 Audio

MPEG audio layer II, the sound of DVDs, DAB radio and broadcast.

Extensions: .mp2
MIME type: audio/mpeg
Kind: Audio

Options for GSM to MP2

audio.bitrate: Audio bitrate in kbit/s.
audio.channels: Number of audio channels. 1 is mono, 2 is stereo.
audio.denoise: Reduce steady background noise.
audio.normalize: Normalize loudness to -16 LUFS as streaming services do.
audio.sample_rate: Audio sample rate in Hz.
speed: Playback speed multiplier. 2 plays twice as fast.
trim_end: Second at which the audio or video stops.
trim_start: Seconds to cut from the start of audio or video.