About Icon

About & Pics

About Icon


Store and edit patches on your THR amplifier directly from your phone or tablet!

Yamaha's THR series are terrific little amplifiers. Unfortunately they only have the ability to store 5 patches on-board. The only way you can access more than 5 patches is hook your amp up to a PC or Mac and install Yamaha's THR Editor application. In addition, some of the amplifier effects such as the compressor are only accessible through Yamaha's PC application.

Until now.

Introducing THR Librarian. Simply attach your Android phone or tablet to your amplifier using a USB On-The-Go adapter, and you can switch between patches and edit them right from your device.

What you need:

- An Android phone or Tablet that supports USB On-The-Go.
- A Yamaha THR5, THR5A, THR10, THR10C or THR10X amplifier (THR-II series not currently supported).
- The USB cable that came with your amplifier.
- A USB OTG adapter. If your phone has a USB Micro-AB connector, you will need an adapter like this one: http://a.co/3mustjw. If your phone has a USB Type-C connector, you will need an adapter like this one: http://a.co/fBZA0vM.

The free version of the app allows you to test your connection and load the built-in demo patches. A single in-app purchase is offered if you wish to unlock the full feature set, which will allow you to:

- Download patches from your amplifier.
- Modify all of the parameters available on your amp, including ones not directly accessible such as the compressor. The editor also changes in real-time as you adjust the parameters on your amp.
- Organize your patches using labels, just like popular email apps. Use labels to tag your favorite patches, or create a set list for a live performance.
- Use the hotkey feature in combination with a Bluetooth HID keyboard or pedal board (e.g. https://www.airturn.com/407.html) for hands-free patch switching.
- Import patches from .YDP and .YDP files.
- Rename and delete patches.
- Share patches via email, Google Drive, Android Beam, etc.
- Receive all future updates for the life of the product.


In the unlikely event that THR Librarian is unable to connect to your amplifier:

1) Verify your amplifier is able to connect to Yamaha's THR Editor on your PC.
2) Verify your phone/tablet supports USB OTG using one of the free OTG checker apps in the Play Store.
3) Try plugging a USB thumb drive into your USB OTG adapter; your phone/tablet should automatically recognize the drive. Note if you have a OnePlus device, USB OTG is disabled by default, and must be enabled under Settings/Advanced. It also automatically turns off 10 minutes after it is enabled. You can permanently enable it by following the instructions here: https://www.xda-developers.com/enable-always-on-otg-oxygenos/.

If these checks all succeed and you are still not able to get the app to connect, please contact us directly at apps4amps@gmail.com. Note we are unable to provide support for connection issues through the Play Store review channel, as it only permits a single character-limited response.

Please note that prior to v2.10 each feature was available for purchase individually. Many users found this to be confusing, so as of v2.10 the features have been combined into one single purchase.

Note: This app is not affiliated with or endorsed by Yamaha Corporation in any way. THR is a registered trademark of Yamaha Corporation.

Google Play Store Category:

Primary: Applications

Secondary: Music & Audio

Google Play

Total Ratings



THR Librarian screenshot 1THR Librarian screenshot 2THR Librarian screenshot 3THR Librarian screenshot 4THR Librarian screenshot 5THR Librarian screenshot 6THR Librarian screenshot 7

Version History

Launched Apr 03, 2016 (almost 4 years ago).

Releasing new versions every about 2 months, on average.

Dec 20
Version 5.1.1

Improved hotkey support

Mar 19
Version 5.0.3

- Fix 10" tablet menu
- USB driver improvements

Feb 22
Version 5.0.1

Tablet UI improvements

Feb 13
Version 5.0

Tablet UI improvements

Jan 13
Version 4.1.3

- Support for exporting YDP files
- Automatically label YDP imports
- Add the ability to display values and fine tuning buttons on sliders
- USB driver improvements

Dec 22
Version 3.1.4

Support for labeling patches and other UI improvements.

Dec 09
Version 3.1.3

Support for labeling patches and other UI improvements.

Nov 11
Version 3.1.2

Support for labeling patches and other UI improvements.

Nov 08
Version 3.1.1

Support for labeling patches and other UI improvements.

Sep 22
Version 2.11

Fix disconnect issue on Android 4.x

Sep 15
Version 2.10

Remove the separate librarian and editor purchase options, as many users found it confusing.

Mar 25
Version 2.9

- Add up/down keyboard support to the library view. This allows you to cycle through your patches using a keyboard or a Bluetooth footswitch such as the AirTurn.
- Add the ability to auto-start THR Librarian when you plug in your amp

Jan 11
Version 2.7

- Fixed a UI glitch when overwriting an existing patch

Dec 11
Version 2.6

- Added the ability to set a hotkey for each patch. Use this along with a USB or Bluetooth HID footswitch to enable hands-free patch changes!
- Added multi-select support to the library for bulk sharing and deletion.

Oct 31
Version 2.5

- Add option to disable cabinet emulation (select 'None' for the cabinet)
- Add settings dialog to allow enabling/disabling the LEDs & Extended Stereo mode

Oct 24
Version 2.4

- Add option to disable cabinet emulation (select 'None' for the cabinet)
- Add settings dialog to allow enabling/disabling the LEDs & Extended Stereo mode

Oct 16
Version 2.2

Fixed issues with compressor parameter editing.

Oct 09
Version 2.1

Fixed issues with reverb parameter editing.

Oct 08
Version 2.0

Patch editing feature now available!

Sep 15
Version 1.6

- Fix patch importing on older (pre 4.1) versions of Android

Jul 21
Version 1.5

- Fix patch importing on older (pre 5.0) versions of Android

May 02
Version 1.4

- Added support for automatic patch backups when running on Android 6.0+

Apr 24
Version 1.3

Apr 21
Version 1.2

Apr 20
Version 1.1

Apr 03
Version 1.0

Click to see more