Feedback Trainer
Ear Training for PA
Free · Designed for iPad. Not verified for macOS.
A frequency ear training app for PA engineers and audio professionals.
The ability to quickly identify problem frequencies that cause feedback is a skill built through experience. Train your ears with this app and sharpen your instincts for the stage and studio.
Features
Visual learning with a 31-band graphic EQ display
Two modes: Phone-Friendly (100Hz–16kHz) and Full Range for external speakers (40Hz–16kHz)
Hint mode for beginners
Track your accuracy and progress history
Available in Japanese, English, Chinese, French, and Spanish
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Added banner ads and a Remove Ads in-app purchase.
The developer, Shunsuke Takasu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 4.2 MB
- Category
- Music
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, French, Japanese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Provider
Shunsuke Takasu
- Shunsuke Takasu has identified itself as a trader for this app and confirmed that this product or service complies with European Union law.
- Address
〒4440703
Aichi Nishio 11-1 minamitango
nishihazucho cho
Japan - Phone Number
+81 8095491507 - Email
shunn108nz@gmail.com
- Copyright
- © 2026 Hazu Studio