Comparison

NDS4615AU vs HARMONY DSP

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

NDS4615AU

Features
Read full description

NDS4615AU is a application for Nakamichi Digital Sound Processor.

About

HARMONY DSP

Features
Read full description

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 8 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 EQโ€™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 (MP2/4, WMA, APE, FLAC, AAC, M4A,WAV, AIF, AIFC). From the App it is possible to access the folders and the contained audio files.

Screenshots

NDS4615AU4 screens
HARMONY DSP4 screens

Verdict

The call

The clearest difference is update cadence: NDS4615AU at every 2 days against HARMONY DSP's every 19 months. NDS4615AU also leads on iOS requirement (9.0 vs 11.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NDS4615AU ships an update every 2 days, HARMONY DSP every 19 months. The most recent releases landed on October 25, 2026 and November 3, 2026 respectively.

Scorecard2 real differences ยท 4 level
NDS4615AU versus HARMONY DSP: the parameters behind the verdict, then further details
ParameterNDS4615AUHARMONY DSP
PriceFreeFree
Update frequencyEvery 2 days โ€” betterEvery 19 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.0 โ€” better11.0
Further details โ€” not scored
Size53 MB3 MB
Age rating4+4+
DeveloperGuangzhou Aidan Blessindo Electronic Co.,Ltd.APEX Italy

In-app purchases

None

NDS4615AU

No in-app purchases

None

HARMONY DSP

No in-app purchases

Questions

Is NDS4615AU free?
NDS4615AU is free to download, with no in-app purchases.
Is HARMONY DSP free?
HARMONY DSP is free to download, with no in-app purchases.
Do NDS4615AU or HARMONY DSP have ads?
Neither NDS4615AU nor HARMONY DSP shows ads.
Which is updated more often, NDS4615AU or HARMONY DSP?
NDS4615AU ships an update every 2 days, and HARMONY DSP every 19 months. Most recently, NDS4615AU was updated on October 25, 2026 and HARMONY DSP on November 3, 2026.

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