I have not worked with Elevenlabs for 2

[weary leaf]

Did you ever end up figuring out a solution to targetting a specific length or duration of audio?

[fleet cairn]

The software you need has been available for several years, but it comes with more sophisticated and expensive programs. Your first problem is that 11Labs renders your audio in a medium grade mp3 format. You really need to start with audio in the .wav format. I understand that .wav is now available from 11Labs using their Projects package, but I have not yet tested it. Another option is to take the low-grade mp3 files from 11Labs and simply re-render them to .wav format. This is not a recommended, tried and true procedure, because the quality produced by re-rendering in this direction can produce unwanted artifacts. It may work, it may not work. The best way to achieve independent control over speed and pitch is to start with a DAW (A Digital Audio Work Station), which means your computer must contain fast, multi-core processors and a lot of DRAM memory, plus a special software package designed for music production, such as Logic, Abelton, Cakewalk, Cubase, Reaper, FL Studio, etc. ($500). You don't need something as over-rated as ProTools. If you have Apple, your first choice should be Logic rather than Garage Band ($600). Abelton Lite may work, but I haven’t tested it. You then purchase special voice manipulation software which the music industry has been using for decades, e.g. Auto-tune or Melodyne. ($450). I know. I know. You just wanted something free. The problem with using the free packages available with software like Audacity, is that speed and pitch are tied together; as you increase speed, you raise the pitch of the voice. The cheaper packages do not allow independent manipulation of either dynamic independently. That’s not what you want. Even after you have altered pitch and/or speed, you will very likely have to spend time editing the waveform. First try editing the waveform. It is free but very tedious.

[opaque pawn]

@fleet cairn, thanks for the hint, so your recommendation is to postedit the Audio-File with a more sophisticated music program. I will be looking into that long list of suggestions! If the problem is sloved, probably worth to invest 500 bucks!