# EDSP4-31BT

> Bluetooth tuner with 6 sound modes and 31-band EQ, supporting USB playback. (iPhone/iPad app by Cheng Pu Chiang.)

- Source: https://appshunter.io/ios/app/edsp4-31bt/id1462558049 (this page in markdown: same URL + `.md`)
- Developer: [Cheng Pu Chiang](https://appshunter.io/developer/1427247397)
- Category: Utilities, Music
- Price: Free
- Age rating: 4+
- Requires: iOS 9.0 · 51 MB
- Languages: English, Chinese, Chinese
- Released: 2019-05-06
- Data updated: 2026-08-26
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/edsp4-31bt/id1462558049/reviews.md

## What is EDSP4?

一个便捷专业的调音APP，支持4.0蓝牙，内置6种音效模式，31段EQ调节。让您有不一样的听觉享受。播放器界面，支持U盘播放。

## Key features

- Bluetooth 4.0 connectivity
- 6 built-in sound effect modes
- 31-band equalizer adjustment
- Player interface
- USB playback support

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/edsp4-31bt/id1462558049/reviews.md

### 5/5 — Hi

*2021-07-07, version 1.0.1*

请问有Android 的App供下载吗？

### 2/5 — Robin

*2021-01-17, version 1.0.1*

One critical thing that all preset setting can be save but not the input signal. Every time it will back to hi level input although I'm  using AUX (RCA). Pls fix it.

## Frequently asked questions about EDSP4

### What devices does EDSP4-31BT support?

EDSP4-31BT is designed for iPhone and iPod devices. It is rated for users aged 4 and above.

### How often is EDSP4-31BT updated?

The app was last updated on November 20, 2020, with version 1.0.1. The initial release date was May 6, 2019.

### Does EDSP4-31BT have ads?

No, EDSP4-31BT does not contain advertisements. It is a free application.

### What are the sound modes available in EDSP4-31BT?

EDSP4-31BT features 6 different built-in sound effect modes to enhance your listening experience.

### Can I adjust the audio frequencies with EDSP4-31BT?

Yes, EDSP4-31BT offers a 31-band equalizer (EQ) for precise adjustment of audio frequencies.

### Does EDSP4-31BT allow playback from USB drives?

Yes, the player interface within EDSP4-31BT supports playback of audio files directly from USB drives.

### What is the primary function of EDSP4-31BT?

EDSP4-31BT is a professional tuning application that provides advanced audio adjustments like EQ and sound modes, alongside playback capabilities.

## Version history (last 2 releases)

### 1.0.1 — 2020-11-20

1.音效增加保存和删除功能。

2.修复已知bug。

### 1.0.0 — 2019-05-05

No release notes.

## Apps similar to EDSP4

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [AWAVE DSP TUNING](https://appshunter.io/ios/app/awave-dsp-tuning/id6670591150) | — | Free | Utilities |
| [CF-A8PRO](https://appshunter.io/ios/app/cf-a8pro/id1639492985) | — | Free | Utilities |
| [芊芊鸟](https://appshunter.io/ios/app/id6738582621) | — | Free | Utilities |
| [FDSD Series](https://appshunter.io/ios/app/fdsd-series/id6680157383) | — | Free | Utilities |
| [Material Removal Rate](https://appshunter.io/ios/app/material-removal-rate/id6503178665) | — | $1.99 | Utilities |
| [Rebec DSP](https://appshunter.io/ios/app/rebec-dsp/id6449889089) | — | Free | Utilities |

## More apps by Cheng Pu Chiang

- [RMH-8APP](https://appshunter.io/ios/app/rmh-8app/id1427247398)
- [SB-106AD](https://appshunter.io/ios/app/sb-106ad/id1471492341)
- [EDSP4-31BT V2](https://appshunter.io/ios/app/edsp4-31bt-v2/id1588222306)
- [MS8.6DSP](https://appshunter.io/ios/app/ms86dsp/id6449612008)

All apps by Cheng Pu Chiang: https://appshunter.io/developer/1427247397

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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 2026-08-26.*