HDS iSound 4+


    • 5.0 • 3 Ratings
    • $8.99
    • Offers In-App Purchases

iPad Screenshots



HDS iSound is a hiqhquality virtual soundmodule for your iPad. Play your iPad with external MIDI instruments, accordion-MIDI, soundenlargement for your stage-setup or as stand-alone for training and learning at home.
Using the sample-library of HDS Pro.Sound1 and HDS Sound.Power offers HDS iSound a very realistic and authentic sound reproduction. By real-time streaming the audio samples can be played in very high polyphony and low latency of only 5ms.


- Accordion folkmusic
- Styrian button-Box (diatonic)
- Oberkrainer-Guitar / GitChordSamples for accompainment
with Major / Minor / Sept. / Deminished-chords*
- Baritone short/long**
- Baritone
- Gaudi-Sample SET

more available sound variations and sound packs as In-App purchases :

Accordion-Pack*, Styrian-ButtonBox-Pack*, GitChord-Pack*, Baritone2, Bass-Pack, Trumpet/Clarinet-Pack, Stubnmusi-Pack, DrumSet-Pack

*for using GitChordSamples, GitChordPack, Accordion- and StyrianPack with MIDI-accordion (bass-side), make sure that your MIDI-system includes the SampleChannel-Option.
**switch with SoftPedal – Midicontroller CC 67


- record with the built-in MIDI Recorder and save and upload
your songs in Standard MIDI file format
- unlimited number of tracks
- 16 separate MIDI channels, assignable individually
for each track
- unlimited recording and playback time
- load SMF MIDI files to your device using the iTunes software
- use Midi Files in the app and you will see on
the virtual keyboard which notes are played
- use the unique "Tempo-Zoom" slider to, i.e. for slowing
down songs in order to learn them easier
- Song-Export to MIDI - WAV - M4A(AAC)


- Polyphony depending on used iPad-model up
to 120 stereo voices
- configurable audio latency down to 5ms
- built-in DSP effects with 17 presets
- RunApp in background, so you can play and at the same
time, for example, with another app, show sheets
or lyrics or play back MP3s
- supports Apple 's "inter - app audio " system (iOS7) for
audio & MIDI streaming to / from other apps
- supports " JACK Audio Connection Kit " (up to iOS 6.1.3)
for audio & MIDI streaming to / from other apps.
- supports Audio Unit (iOS 9.3)


For good performance we recommend iPad4 and later.

Please note that this app requires a lot of hardware resources.
If you encounter problems with the app, please close all running applications in the background by pressing twice on the "Home" button and in the list of displayed apps hold onto a tap and - then press the "minus sign" in the corner, to close this application. Then close all other apps.

For more information on compatible MIDI adapter, please visit the website www.hdsmusic.de or ask your music retailer.

What’s New


- new sound set overview dialog

Ratings and Reviews

5.0 out of 5
3 Ratings

3 Ratings

Pianoman Tompkins ,

Fantastic app

I absolutely love this app! The sounds are so realistic, more realistic than any keyboard workstation, or flagship synthesizer I’ve ever heard. I plan to make music with this app, for years to come. Just listening to the demos before I installed the additional sound packs, I felt like I was in Germany! Very very good job!

Thiensun88 ,

Dot not buy this

Expensive but qualify sounds, you can preset the accordion you want and recall it when you need,(just turn on playing back ground and play it on midi accordion you have on iPad )ex: you can preset one accordion with mussette treble, trumpet chords, and Ebass, etc...you can watch video ''dan phong cam the key 21'' on YouTube to hear the sounds

Critic313 ,

Not ready for performance

It is very hard to control the volumes of each part. I couldn't get enough volume out of the bass part with bellows dynamics of my midi accordion. If I turn off expression in my accordion, then the treble is too loud. It seems that you have to adjust the volume of each part every time you start the app as you can't really save your settings. The accordion sound is quite good, but very little choice for the price. I didn't care for the guitar at all. Some other guitar sounds are available for purchase. Then again, the whole thing becomes too expensive.

App Privacy

The developer, HDSmusic, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

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