--format works with ">" but it captures not valid data from stdout [Sierra]

[alundiak]

When I execute any commands using --format and > files created, but they all have at the beginning of file

itunes-data --tracks --format json ~/Music/iTunes/iTunes\ Music\ Library.xml > data/tracks2.json
itunes-data --artists --format tsv ~/Music/iTunes/iTunes\ Music\ Library.xml > data/artists2.tsv
itunes-data --artists --format csv ~/Music/iTunes/iTunes\ Music\ Library.xml > data/artists2.csv

Note: I don't use --library and --playlists due the errors described in issues: #6, #8, #10

NOT valid JSON then.

reading: /Users/alund/Music/iTunes/iTunes Music Library.xml (2195303 bytes)
�[6n[
{"Track ID":1158,"Size":8575284,"Total Time":206376,"Year":2015,
...

NOT valid TSV then.

reading: /Users/alund/Music/iTunes/iTunes Music Library.xml (2195303 bytes)
�[6nName	Track Count	Play Count
16 Bit Lolitas	1	3
4 Strings	1	1

...

NOT valid CSV then.

reading: /Users/alund/Music/iTunes/iTunes Music Library.xml (2195303 bytes)
�[6nName,Track Count,Play Count
16 Bit Lolitas,1,3
4 Strings,1,1

...

PS. I'm on iTunes v12.5.5.5, macOS Sierra v10.12.3, node v7.5.0, npm v4.1.2
itunes-data installed globally (0.1.3)

сс/ @shawnbot

[alundiak]

@shawnbot up

[alundiak]

This time, I have iTunes v12.8, MacOS v10.13.6, node v10.11.0, npm v6.4.1.

I installed [email protected] locally, and I tried with initial version of itunes-data.
Here is is my npm scripts:

  "scripts": {
    "start": "node server.js",
    "csv": "itunes-data --tracks data/tracks.csv ~/Music/iTunes/iTunes\\ Music\\ Library.xml",
    "tsv": "itunes-data --tracks data/tracks.tsv ~/Music/iTunes/iTunes\\ Music\\ Library.xml",
    "json": "itunes-data --tracks data/tracks.json ~/Music/iTunes/iTunes\\ Music\\ Library.xml",
    "jsonFormat": "itunes-data --tracks --format json ~/Music/iTunes/iTunes\\ Music\\ Library.xml >> data/tracks2.json"
  }

TO be sure it's not fast-csv fault, due to #issue #15 I installed [email protected] manually. I tried also with fast-csv@latest:

  "dependencies": {
    "fast-csv": "^2.4.1",
    "itunes-data": "^0.1.4"
  }

I have to remove manually ./node_modules/itunes-data/node_modules/fast-scv

But described issue above is still reproduced.
BTW, I also tried --format==json and using >>. Still the same - all stdout goes to file.