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2.6 will drop SynthStation 25 and MIDI Mobilizer support

General discussion about Music Studio.

2.6 will drop SynthStation 25 and MIDI Mobilizer support

Postby Alex » Sun Nov 30, 2014 4:04 am

Unfortunately we have no choice because the manufacturers (Akai and Line 6) don't provide us (nor any other app developer) with 64 bit versions of their SDKs.

Why must we move to 64 bit?
Because Apple requires every app and update that is submitted after 1.2.2015 to be 64 bit:
http://www.engadget.com/2014/10/20/apple-to-require-64-bit-ios-apps/
There's no way around it unfortunately. We didn't intend to implement 64 bit support anytime soon but now we had to move it to the top of the list, otherwise we wouldn't be able to release updates after February 2015. As a positive side effect, the 64 bit version runs faster and with higher audio quality on devices with 64 bit CPUs (iPad Air, iPad Mini 2, iPhone 5S and later).

Why does this only affect the Akai SynthStation 25 and the Line 6 MIDI Mobilizer 1?
Because all other supported devices are CoreMIDI compatible, e.g. the Line 6 MIDI Mobilizer II. Akai SynthStation 25 and Line 6 MIDI Mobilizer were released before iOS supported CoreMIDI, so the manufacturers developed their own SDKs (the thing we app developers need to implement support). CoreMIDI compatible devices just work, they don't require special SDKs. Akai and Line 6 updated their SDKs a few times, but that was years ago and they didn't include 64 bit support.

What can we do?
We contacted Akai and Line 6 and requested 64 bit versions of their SDKs. There was no response, even from contacts that we talked to 2-3 years ago. We also heard from other developers that they stopped responding.

:arrow: Contact Akai and/or Line 6, tell them that you own a SynthStation 25 or MIDI Mobilizer (original, not version II) and that app developers like Xewton (for Music Studio) require an updated version of the SDK that includes "arm64 and armv7 slices" in order to support the device after 1.2.2015.
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Re: 2.6 will drop SynthStation 25 and MIDI Mobilizer support

Postby Bianca » Mon Dec 01, 2014 3:25 pm

From comments I have seen from a couple of other developers the requirement is to provide 64 bit support on 64 bit devices. Apparently there is no requirement from Apple that 32 bit SDKs cease to be supported on 32 bit devices. So since all the 30 pin devices are also 32bit It would apparently be technically possible to continue support.

However I understand that the amount of extra coding required and the memory overhead may not be something you want to get involved with.
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Re: 2.6 will drop SynthStation 25 and MIDI Mobilizer support

Postby Alex » Thu Dec 04, 2014 1:50 pm

Thanks for the hint, we'll do a feasibility test for leaving in the SDKs in the 32 bit slice of the app.
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Re: 2.6 will drop SynthStation 25 and MIDI Mobilizer support

Postby Alex » Thu Dec 25, 2014 1:02 pm

Apple informed us that the 64 bit deadline for updates is June (not February), so there's more time for us to develop and thoroughly test the 2.6 update.

Regarding the MIDI Mobilizer I, we managed to retain compatibility for non-64bit devices (iPad 4 and earlier). With SynthStation 25 support this is not feasible, unfortunately.
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Re: 2.6 will drop SynthStation 25 and MIDI Mobilizer support

Postby Bianca » Mon Dec 29, 2014 11:52 am

Alex wrote:Apple informed us that the 64 bit deadline for updates is June (not February), so there's more time for us to develop and thoroughly test the 2.6 update.

Regarding the MIDI Mobilizer I, we managed to retain compatibility for non-64bit devices (iPad 4 and earlier). With SynthStation 25 support this is not feasible, unfortunately.



The glass is half full then :) thanks for trying.
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