olw-player

Start with your MIDI file. Shape a backing track that feels more natural, balanced and enjoyable to play with. olw-player works on both the performance written in the file and the sound you hear: two different stages in one program. Open the song, choose a SoundFont, listen and adjust the options. Your original file stays intact.

Take a MIDI file and turn it into lifelike sound

A different instrument sound is a start. How the notes are played matters too: legato, expression, dynamics, overlapping parts and levels can make even a good SoundFont sound artificial. Here you can work on both layers without setting up a DAW project.

An audio chain, beyond changing instrument sounds

After MIDI corrections, the synthesiser produces the sound. You can then apply the stages you need for that song:

Adjust these controls to taste rather than switching every effect on. Some incompatible combinations are handled automatically. Results depend on the source MIDI, SoundFont and settings; you can save song preferences and compare processing by switching it on and off.

This chain processes synthesised MIDI/KAR sound, rather than MP3, CD+G or video. MIDI export saves musical edits; audio effects remain part of synthesiser playback.

Explore corrections and effects in the guide

Keep the song’s character or choose a new interpretation

Keep the MIDI’s original setup and work on its corrections, or choose from 14 styles, from Rock and Jazz to Disco / Dance, Latin / Bossa, House and R&B. For supported style families, with rearrangement enabled, accompaniment parts are rebuilt from recognised chords. Protected parts are excluded from that processing.

Then take it live

olw-player also plays MIDI, KAR, CD+G, MP3 and video: change key during playback, display karaoke lyrics on Monitor and Mirror, and mute the guide melody to sing over the backing track. The difference starts with MIDI enhancement before the lyrics even appear.

What it looks like

The main window: playlist, SoundFont, channel muting, lyric mode and key, all within reach.

MIDI/KAR options: file corrections and real-time effects can be switched on and off with a checkbox.

What it can do

• Formats: MIDI (.mid), KAR, CD+G (.cdg with its MP3), MP3 and MP4/MOV/AVI video. An MP3 alongside a .cdg file with the same name is recognised as a single song.
• Three karaoke lyric modes: word by word (with the current word highlighted), phrase by phrase and vertical scrolling: three phrases at a time, with the line to sing in yellow in the centre and the current word in orange, moving up at each change.
• 14 MIDI styles: Rock, Funk, Pop, Jazz, Ballad, Electronic, Blues, Disco / Dance, Latin / Bossa, Country / Folk, Reggae / Ska, House, Hip Hop and R&B. Corrections and sounds follow the selected style; chord-based rearrangement is available for supported families when enabled.
• All features included: style changes and processed MIDI export are included in the subscription and the 30-day free trial (details).
• Options with explanations: each option has help (right-click → Help) explaining its purpose and conflicts; selecting an option automatically disables incompatible options and restores them when it is deselected.
• Channel muting: remove the guide melody or accompaniment to sing over the backing track yourself.
• One-click seeking on the progress bar, including video and CD+G and while paused.
• SoundFont included (FluidR3 GM): ready to use without searching for anything else. You can always choose your own .sf2.
• Built-in help, the same guide available on this website.

How to get it

Installation

Support