# DSI-2 > Car audio system tuning app for DD Audio DSI-2 digital signal processors. (iPhone/iPad app by DD Audio.) - Source: https://appshunter.io/ios/app/dsi-2/id1379793450 (this page in markdown: same URL + `.md`) - Developer: [DD Audio](https://appshunter.io/developer/599474306) - Category: Music - Price: Free - Rating: 3.80/5 from 8 App Store ratings · 7 written reviews indexed - Age rating: 4+ - Requires: iOS 8.0 · 38 MB - Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan) - Released: 2018-08-31 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/dsi-2/id1379793450/reviews.md ## What is DSI? The DSI-2 app is designed for use with the DD Audio DSI-2 digital signal processor, this app gives you the tools needed to fine tune virtually every aspect of you car audio system. Whether you’re a professional installer or an obsessive audiophile this app allows you to realize the true potential of your audio equipment with a straightforward layout and logical controls. Features: - Bluetooth 4.0 compatible - 6 customizable presets - 10 bands of parametric equalization per channel - Phase correction - Crossover type, frequency, and slope adjustments - Independent input and output level controls - Time alignment - Input summing and linking ## Key features - Bluetooth 4.0 compatible - 6 customizable presets - 10-band parametric EQ per channel - Phase correction - Crossover adjustments - Time alignment - Input summing and linking ## Recent user reviews (7 of 7) All indexed reviews: https://appshunter.io/ios/app/dsi-2/id1379793450/reviews.md ### 5/5 — Great product!! *2024-10-26* Has this DSP app on my Harley since it hit the market years ago…Competition level!!! Works very well for me💪 ### 5/5 — Five stars amazing product *2023-08-27* 10 out digitally processed channels with 6 analog input, simple yet very effective. It’s able to Build a very complex system. Being able to tune all that from your phone, wow. App works great for iPhone 12 and XR. Using this for a portable Bluetooth speaker and to the person asking if you can use some regular Bluetooth adapter, I don’t know but if you use the CORRECT one the unit works great! Overpriced or not, it’s worth it for it to work correctly. Issue with people trying to build a nice sounding system is being cheap. Just my 2 cents. ### 3/5 — Help? *2019-07-15* Does anyone know if you can use any bluetooth 4.0 usb dongle? instead of buying their overpriced one? ### 1/5 — It doesn’t let me connect to the DSI-2 on iPhone X *2019-03-08* New update for i phone needed ASAP ### 1/5 — App doesn’t work for IOS 12.1.4 *2019-02-20* I have an iPhone XS Max and I can’t use this app to tune my DSI-2. I tried to connect via an android device and it worked fine. I guess the app needs an update to work with the latest IOS update or something of that sort. ### 5/5 — DSP tune and Steam music *2018-08-30* Awesome app to steam music with Bluetooth 4.0 as well as tuning on the fly via cellphone. Master volume control and more. No head unit needed. Phone, DSI-2, amps to speakers and you are good to go. Easy to learn and use. Huge improvement on audio quality and performance. ### 5/5 — Perfect! *2018-08-30* Easy to use, my system sounds awesome now! ## Frequently asked questions about DSI ### What is DSI-2 used for? DSI-2 is an app designed to fine-tune your car audio system when used with the DD Audio DSI-2 digital signal processor. It allows for detailed adjustments to sound parameters. ### Does DSI-2 have ads? No, DSI-2 does not contain advertisements. It provides an ad-free experience for users focused on audio tuning. ### What devices is DSI-2 compatible with? DSI-2 is compatible with iPhone and iPod devices. It requires Bluetooth 4.0 for connection to the DSI-2 processor. ### How often is DSI-2 updated? The latest version of DSI-2 is 1.0.3, last updated on March 22, 2019. Updates are not frequent, but the app provides core functionality for audio tuning. ### What are the key audio tuning features in DSI-2? DSI-2 offers 10 bands of parametric equalization per channel, phase correction, crossover adjustments, independent input/output level controls, and time alignment. ### Can I save my audio settings in DSI-2? Yes, DSI-2 includes 6 customizable presets, allowing you to save and recall your preferred audio configurations for different listening scenarios. ### What is the user rating for DSI-2? DSI-2 has an average rating of 3.8 stars based on 8 user reviews. This indicates a generally positive but mixed reception from its user base. ### Is DSI-2 suitable for beginners? While designed for professionals and audiophiles, DSI-2 features a straightforward layout and logical controls, making it accessible for those new to car audio tuning with a DSI-2 processor. ## Version history (last 2 releases) ### 1.0.3 — 2019-03-22 Fixes for iOS version 12 ### 1.0 — 2018-08-30 No release notes. ## Apps similar to DSI | App | Rating | Price | Category | | --- | --- | --- | --- | | [STETSOM STX DSP](https://appshunter.io/ios/app/stetsom-stx-dsp/id1615834724) | 4.7 (289) | Free | Music | | [Bass Enhancer](https://appshunter.io/ios/app/bass-enhancer/id1508482793) | 4.5 (35) | Free | Music | | [Bass Tester & Booster Pro](https://appshunter.io/ios/app/bass-tester-and-booster-pro/id941024213) | 3.9 (223) | Free | Music | | [RTA Audio](https://appshunter.io/ios/app/rta-audio/id525324684) | 3.6 (31) | Free | Music | | [EQ560](https://appshunter.io/ios/app/eq560/id1486125569) | 3.7 (29) | Free | Music | | [Car Audio](https://appshunter.io/ios/app/car-audio/id1011824786) | 4.0 (4) | Free | Music | ## More apps by DD Audio - [DD Toolbox](https://appshunter.io/ios/app/dd-toolbox/id599474303) - [DSI-3](https://appshunter.io/ios/app/dsi-3/id1544985377) All apps by DD Audio: https://appshunter.io/developer/599474306 --- *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 2026-06-01.*