# HD-300 Assistant

> Remote control and guidance application for the HD-300 musical device. (iPhone/iPad app by Yamaha Corporation.)

- Source: https://appshunter.io/ios/app/hd-300-assistant/id1526764718 (this page in markdown: same URL + `.md`)
- Developer: [Yamaha Corporation](https://appshunter.io/developer/353469356)
- Category: Music
- Price: Free
- Rating: 5.00/5 from 3 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 76 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2021-03-15
- Data updated: 2026-07-20
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/hd-300-assistant/id1526764718/reviews.md

## What is HD?

* The device on which this application is installed must be connected to the HD-300 via Bluetooth®. The application does not produce sound independently.

The HD-300 Assistant application allows an instructor to remotely control the HD-300 and provide intuitive guidance to students.

≪ Functions ≫

• HD Control
In addition to keyboard and metronome operation, the app allows remote control of temperament and transposition.

• Beat, Tempo Setting
Irregular meter and tempos can easily be created, saved, and played back.

• Individual Volume and Pitch
Fine adjustment is available for individual volumes and pitches.

• Demonstrate Mode
The interference beat that occurs when notes are slightly out of tune can be recreated, and the volumes of harmony notes can be adjusted to give students a feel for appropriate pitch and volume.

• Chord Detector
Chords can be detected and named based on a group of played notes.

• Tuner
The tuner provides a convenient means to check pitch. The tuner’s base pitch is adjustable.

・ Rhythm Assistant
The app can play the same rhythm as musical score.

## Key features

- Remote HD control (keyboard, metronome, temperament, transposition)
- Customizable beat and tempo settings
- Individual volume and pitch adjustment
- Demonstrate mode for pitch and volume feedback
- Chord detection and naming
- Adjustable tuner
- Rhythm assistant


## Frequently asked questions about HD

### Does HD-300 Assistant have ads?

No, HD-300 Assistant does not contain advertisements. It is a completely ad-free application.

### What devices is HD-300 Assistant compatible with?

HD-300 Assistant is designed for use on iPhone, iPad, and iPod devices. It requires a Bluetooth connection to the HD-300 device.

### How often is HD-300 Assistant updated?

The latest version of HD-300 Assistant is 2.4.0, last updated on February 4, 2026. While specific update frequency isn't detailed, this indicates ongoing support.

### What is the age rating for HD-300 Assistant?

HD-300 Assistant has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### Can HD-300 Assistant be used offline?

The application itself does not produce sound independently and requires a Bluetooth connection to the HD-300 device. Therefore, offline use is dependent on the HD-300's functionality.

### What are the main benefits of using HD-300 Assistant for music students?

Students can benefit from precise pitch and volume adjustments, the ability to recreate interference beats for tuning practice, and a rhythm assistant that mimics musical scores, all remotely controlled by their instructor.

### How does the chord detector in HD-300 Assistant work?

The chord detector analyzes a group of played notes and identifies the corresponding chord name. This feature aids in understanding harmony and musical composition.

### What makes the tuner in HD-300 Assistant useful?

The tuner provides a convenient way to check pitch accuracy. Its base pitch is adjustable, allowing for flexibility in tuning to different standards.

## Version history (last 5 releases)

### 2.4.0 — 2026-02-04

Fixed issues related to Bluetooth connectivity and GUI display.

### 2.03 — 2025-01-29

The "End User License Agreement" has been revised.

### 2.01 — 2021-11-29

Simplified Chinese is now supported.

### 2.00 — 2021-04-20

• The Rhythm Assistant function is now supported.
• Fixed a few minor bugs.

### 1.00 — 2021-03-16

No release notes.

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## More apps by Yamaha Corporation

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- [Mobile VOCALOID Editor](https://appshunter.io/ios/app/mobile-vocaloid-editor/id947797108)

All apps by Yamaha Corporation: https://appshunter.io/developer/353469356

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-20.*