THR Librarian app icon

THR Librarian

A patch editor and librarian for your Yamaha THR amplifier.

Apps For Amps · com.appsforamps.thr

Not rated yet 10K+ downloads v9.0 2.8 MB Android 5.0+ PEGI 3 · Everyone

  • Signature matches the Google Play version Details

At a glance

Latest version
v9.0 (84)
Updated
Sep 6, 2025 (1 year ago)
APK size
2.8 MB
Requires
Android 5.0+ (API 21)
CPU support
Any (no native code)
Category
Music & Audio (app)
Listed since
Jul 11, 2021 (at least)
Permissions
7 (3 sensitive)
Developer contact
[email protected]

About this APK

THR Librarian is an app by Apps For Amps in the Music & Audio category, listed since at least July 2021. It has no native code, so it runs on any Android processor.

Since version 8.0.5, the APK grew from 2.3 MB to 2.8 MB and the minimum Android version rose from 4.0 to 5.0. It asks for 7 permissions, 3 of them sensitive: read shared storage, Bluetooth connect and Bluetooth scan. Compared with version 8.0.5, it adds 2 new permissions: “Full network access” and “View network connections”. The app offers in-app purchases through Google Play.

What's new in v9.0

Add support for USB MIDI devices

Description

From the listing uploaded by “appupdater”.

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 into groups. Tag your favorite patches, or create a set list for a live performance. - Use the hotkey feature in combination with a Bluetooth MIDI or HID foot switch (e.g. https://amzn.to/3RqNcDY) for hands-free patch and effect switching. - Import patches from .YDP and .YDP files. - Rename and delete patches. - Share patches via email, Google Drive, Android Beam, etc. Troubleshooting: 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 [email protected]. 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. Terms of Use: https://drive.google.com/file/d/1_06bSOByXYIm38ZCr4nIHy5YdPdt_oqi/view?usp=share_link Privacy Policy: https://drive.google.com/file/d/1PlMfLg_lkhsf-EMuyaHtStbhPFiMYdNi/view?usp=share_link Note: This app is not affiliated with or endorsed by Yamaha Corporation in any way. THR is a registered trademark of Yamaha Corporation.

Version history

2 versions are listed, going back to v8.0.5. Since v9.0 it requires Android 5.0+.

All 2 versions

Security & authenticity

Security rating: Trusted

Signing certificate

  • Signature matches the Google Play version Checked by the source store on Sep 6, 2025.
  • Certificate issued to “AppsForAmps” This is the certificate of the Google Play version.
  • Same certificate as the other version checked

Store checks and file details

  • Developer signature verified Sep 6, 2025
  • Validated against Google Play Sep 6, 2025
  • Signed byCN=Sean Wilson, OU=Android, O=AppsForAmps, L=Kitchener, ST=ON, C=CA
  • Signing certificate (SHA-1)1D:BC:25:00:76:D1:73:24:F5:A2:10:F0:D2:4E:91:85:5A:9C:E0:20
  • File MD58fe92e94981ae4d26fd82ca68b2468c1
  • Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (7)

THR Librarian requests 7 permissions, 3 of them sensitive.

Required hardware & features

THR Librarian APK: questions and answers

Is there a version of THR Librarian for older Android phones?

The current version needs Android 5.0 or later. Version 8.0.5 is the newest listed build that installs on Android 4.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 8.0.5 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is THR Librarian free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the THR Librarian APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is 8fe92e94981ae4d26fd82ca68b2468c1.

Tags

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