# HB II DSP

> HB II DSP (iPhone/iPad app by APEX Italy.)

- Source: https://appshunter.io/ios/app/hb-ii-dsp/id6753644572 (this page in markdown: same URL + `.md`)
- Developer: [APEX Italy](https://appshunter.io/developer/1446565085)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.6 · 3 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2025-10-06
- Data updated: 2026-06-02
- User reviews in markdown: https://appshunter.io/ios/app/hb-ii-dsp/id6753644572/reviews.md

## What is HB II DSP?

The Harmony DSP App allows you to setup and tune your system with your smart phone or tablet. 
In the main screen you will find the Input Source menu where you can choose BT, HI-LEV, USB and AUX. Here you also find 6 Presets (saved into your device) to choose from, you access the Music Player, you have the Main and Subwoofer Volume, and the Advanced menu with Channels, EQ, System and Mixing. 
From the Channel Page, you can assign the function of each speaker, check the Phase for polarity, adjust the individual Channel Gains and set Delay in milliseconds or centimeters, for a rock solid and accurate front stage. 
The EQ page holds the heart and the brains of the App. You can use either the Graphic or the Paragraphic EQ’s. You can customize the crossovers to fit the needs of your individual system. You have adjustments for Gain, frequency, and Q factor. You can work on channels individually or you can link them. 
With the MIX function you can manually determine which inputs (USB-L/R, Digital-L/R, BT-L/R) will be used for each output (processing channel) and how much of each input the output will receive. 
The new Music Player function lets you have full control of all your favorite songs, inside the App. Be sure to connect a proper USB device containing audio files in the supported format. From the App it is possible to access the folders and the contained audio files.


## Version history (last 5 releases)

### 1.0.8 — 2026-01-26

修正连接DSP设备后不读通道类型的问题

### 1.0.7 — 2026-01-13

修复滑动主音量旋钮音量值显示错误的问题

### 1.0.5 — 2025-12-30

Correct the maximum master volume value for the [HB 810 II 8A] version.

New feature: Highlight the currently playing track in the music list.

New feature: Automatically clear the USB music list after disconnection.

EQ page optimization: Channel buttons now display in a linked manner during tuning.

Fix: Resolved an issue where optical music was available on models other than [HB 810 II 8 AD].

### 1.0.4 — 2025-12-05

Limit the delay group buttons to three. 
Fix the remaining text capitalization issues. 
Simplify and improve the channel display format on the delay interface.

### 1.0.3 — 2025-12-04

On the model selection page, change [HB 410 II 4A] to [HB 410 II 8A]. 
For the duplicated channel type name [REAR L WF], change one of them to [REAR R WF].
Correct the maximum values of the master volume and channel volumes for the [HB 810 II 8A] version. 
Fix the issue where the Bluetooth name cannot be updated in real time during device search.

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## More apps by APEX Italy

- [ZAPCO DSP-Z8IVII](https://appshunter.io/ios/app/zapco-dsp-z8ivii/id1446881973)
- [ZAPCO ST-4X/6X/68X DSP](https://appshunter.io/ios/app/zapco-st-4x6x68x-dsp/id1586152719)
- [HARMONY DSP](https://appshunter.io/ios/app/harmony-dsp/id1638244924)
- [HB 410 ADSP](https://appshunter.io/ios/app/hb-410-adsp/id6450350919)
- [HB 46 II 4A-A](https://appshunter.io/ios/app/hb-46-ii-4a-a/id6757208496)

All apps by APEX Italy: https://appshunter.io/developer/1446565085

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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 2026-06-02.*