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Sony LAM-Z10 – SP upload fails at TOC EDITING, while LP2/LP4 work #105

Description

@FrancoisDamien

Hi,

I am experiencing a reproducible SP upload issue with a Sony LAM-Z10.

Configuration:

  • Sony LAM-Z10
  • Windows 11
  • WinUSB driver installed via Zadig
  • Web MiniDisc Pro 1.5.3 Desktop
  • Also tested with ElectronWMD
  • Standard recordable MiniDisc

Symptoms:

  • NetMD connection works normally.
  • Disc erase works normally.
  • LP2 uploads work perfectly.
  • LP4 uploads work perfectly.
  • SP uploads systematically fail at the end of the first track.
  • The problem also occurs with a freshly erased disc and only one track.
  • During the failed SP transfer, the LAM-Z10 reaches "TOC EDITING".

Web MiniDisc then reports:

"Error uploading to device.
There might not be enough space left,
or an unknown error occurred."

There is plenty of free space on the MiniDisc.

I reproduced exactly the same SP failure using ElectronWMD.

Important hardware test:
Direct CD-to-MD recording in SP at normal speed works correctly on the same LAM-Z10.

Therefore the unit is able to record SP audio and successfully write/finalize a TOC when recording directly from CD.

Test results:

  • NetMD SP: FAIL
  • NetMD LP2: OK
  • NetMD LP4: OK
  • Direct CD -> MD SP recording: OK
  • Disc erase through Web MiniDisc Pro: OK
  • I also opened the DevTools console during an SP transfer.

The source file is FLAC, 44.1 kHz stereo. Web MiniDisc successfully converts it to 16-bit / 44.1 kHz PCM before the NetMD error occurs.

Relevant console output:

[Parsed_aresample_0 @ 0x7012c0] [SWR @ 0x706f40] Using s16p internally between filters
Output #0, s16be, to 'file:out.pcm':
Metadata:
encoder : Lavf60.16.100
Stream #0:0: Audio: pcm_s16be, 44100 Hz, stereo, s16, 1411 kb/s
Metadata:
encoder : Lavc60.31.102 pcm_s16be

size= 28677kB time=00:02:46.42 bitrate=1411.2kbits/s speed=71.4x

Complete Job

Then, during the NetMD operation:

Registered callback _netmd_upload_callback4
action=FS

The operation then fails with:

Error: Rejected -
0a1800080046f003010328ff000010010010000000006000037eb01bf5818

This error occurs only with SP uploads.

The same LAM-Z10, USB connection and MiniDisc successfully complete LP2 and LP4 uploads, including TOC EDITING.

Direct CD-to-MD recording also works in SP.

It therefore seems to be specifically related to the NetMD SP upload path on the LAM-Z10.

I still have the LAM-Z10 available for testing and would be happy to run additional tests, provide complete DevTools logs, or test a patched build if useful.

Thank you!

[NB posted the same issue on the ELECTRONWMD dedicated space]

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