It works well here in my VP22B250.

Have you tried resetting? It might be helpful for audio decoding problems.

Does not play on my pc, v22250.

The audio event plays on both my desktop and laptop (VP22b250) ... BUT ... it is nothing but maximum level static. Surprisingly, the waveform on the timeline is minimal in size.

@john_dennis @andyrpsmith @Dexcon I've made more tests. This encoding requires you to install the QuickTime decoder and enable the QuickTime plugin in Preferences -> Deprecated Features. In this way, it can be decoded normally.

Since I need to import some old QuickTime encodings, I've always kept it on. It won't affect the decoding of Apple ProRes, which uses a new decoder, so enabling it won't have much impact.

File Properties got from VEGAS Pro:

General
  Name: iPad Audio Recording.m4a
  Folder: C:\Users\HP\Desktop
  Type: QuickTime
  Size: 294.25 KB (301,308 bytes)
  Created: 2025年5月23日, 14:35:03
  Modified: 2025年5月23日, 14:34:49
  Accessed: 2025年5月23日, 18:41:33
  Attributes: Archive

Media information
  Stream format: MPEG-4
  Audio stream #1
    Audio format: ALAC
    Sampling rate: 48000 Hz
    Channels: 1 channel
    Bit rate mode: Variable
    Bit rate: 321209 bps

Streams
  Audio: 00:00:07.424, 48,000 Hz, 32 Bit (IEEE Float), Mono, Apple Lossless

Summary
  Software: com.apple.VoiceMemos (iPad Version 18.4.1 (Build 22E252))
  [GUDE]: {7BB3FE15-954A-4E75-B5E1-45EE98F74990}

ACID information
  ACID chunk: no
  Stretch chunk: no
  Stretch list: no
  Stretch info2: no
  Beat markers: no
  Detected beats: no

Other metadata
  Regions/markers: no
  Command markers: no

Media manager
  Media tags: no

Plug-In
  Name: qt7plug.dll
  Folder: C:\Program Files\VEGAS\VEGAS Pro 22.0\FileIO Plug-Ins\qt7plug
  Format: QuickTime 7
  Version: Version 22.0 (Build 250)
  Company: MAGIX Computer Products Intl. Co.

And, to install the QuickTime plugin, you need to download and install QuickTime 7.7.9 from https://support.apple.com/106375.

Note that:

The QuickTime web browser plug-in is no longer installed by default and is removed if you have a previous version of QuickTime on your PC. If you still need this legacy plug-in, you can add it back using the custom setup option in the installer.

You need to add it manually during installation.

QT Lite 4.1.0 is also a good choice. It's a pure codec extracted from the original components of QuickTime.

The audio clip played back just fine on my computer spec'ed in my Signature below.

I am on Win11 Pro 23H2 fully up to date. And I do have the Quicktime feature check marked in Deprecated Features.

With W11 24H2, Vegas Pro wants QT installed even when QT is activated in Deprecated Features. The last version of QT for Windows was 7.7.9, but since Apple ceased support for QT for Windows back in 2016, I am disinclined to install it when I really don't need it,

I recall that years ago a Vegas staffer commented on the forum that QT was relegated to Deprecated because the cessation of support for QT in Windows might mean that it could have unintended interactions with Vegas Pro and Windows as they developed over the years.

@john_dennis It works perfectly well in Vegas. Just make sure you have the Quicktime codec installed and activated. No harm doing that.

It would be good for this format to be moved out of the Quicktime decoding bucket if users are often encountering ALAC. I think MJPEG MOV is already decoded natively in VEGAS.