Telegram bots' voice messages get speed control upgrade: devs rejoice after one ffmpeg incantation fixes the mp3 curse nobody noticed

Developers of Telegram bots that utilize text-to-speech (TTS) technology to send voice messages have encountered an issue with the lack of speed control, a feature that allows users to adjust the playback speed of audio. The problem arises from the use of MP3 audio files, which, although playable, are not treated as proper voice messages by Telegram, resulting in the absence of features such as waveform visualization and speed control. To resolve this, developers can convert their MP3 files to OGG Opus format using the ffmpeg command, which enables Telegram to recognize the audio as a voice message, thereby providing speed control buttons. This fix is particularly significant for bots that send lengthy content, as it can substantially reduce playback time. By converting to OGG Opus, developers can ensure their voice messages are compatible with Telegram's voice message system, which is optimized for this format.