This is a reference implementation of the go-netmd-lib as a command-line interface.

Choose the platform below for which you would like to download netmd-cli.

Each download is continuously build by github actions, when ARM based workflows are available I will add these as well.

• For macOS you will need brew and run brew install libusb

> netmd-cli help

Usage:
  netmd-cli [options] command [arguments...]

Commands:
  list                     List all track data on the disc.
  send [wav] [title]       Send stereo pcm data to the disc.
  title [title]            Rename the disc title.
  rename [number] [title]  Rename the track number.
  move [number] [to]       Move the track number around.
  erase [number]           Erase track number from disc.
  group [to] [title]       Put tracks ungrouped up to track number
                           into a group by the name title.
  degroup [number]         De-group including all tracks of the
                           group that are part of the track number.
Options:
  -v             Verbose logging output.
  -y             Skip confirm questions.
  -d [encoding]  Encoding on disk lp2, lp4 or sp (default: sp)
                 lp-modes known to work only with Sharp NetMD
  -i [index]     Set the NetMD usb device index when multiple
                 devices are connected. [default: 0]

You can send raw PCM data in a WAV-container to the NetMD by default encoded in ATRAC (SP) on the device using the chip on the unit.

If you own a one of the units tested positive below you can use the -d lp2 or -d lp4 flag to save the PCM as ATRAC3 on the disc.

The list is not yet complete, so if your device is not listed and if you hear only silence after the transfer was completed you device does not support ATRAC3 through NetMD (USB). You could always use the solution mentioned below to encode the PCM to ATRAC3 first before transfer.

In each case you will need to prepare your source (mp3, aac, flac etc.) the WAV yourself like so:

ffmpeg -i mytrack.flac -f wav -ar 44100 -ac 2 mytrack.wav
netmd-cli send mytrack.wav

It's recommended to use ffmpeg.

You will need to create the LP2 files yourself on the host machine. For this you can use atracdenc created by Daniil Cherednik and put the LP2 encoded track into a WAV-container.

First convert your mp3, flac etc. into a stereo wav file:

ffmpeg -i mytrack.flac -f wav -ar 44100 -ac 2 out.wav

Now encode the wav into an ATRAC3 file with a bitrate of 128 for LP2:

atracdenc -e atrac3 -i out.wav -o out.aea --bitrate 128

Put the AEA file into a WAV container like so:

ffmpeg -i out.aea -f wav -c:a copy mytrack_lp2.wav

And send the wav to the NetMD:

netmd-cli send mytrack_lp2.wav