# Pure Acid and Cubasis 3 Issue **URL:** \ **Category:** Cubasis\ **Tags:** ios, cubasis-3\ **Created:** [December 3, 2020, 9:27am UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599 "2020-12-03T09:27:10Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Cial303](https://avatars.discourse-cdn.com/v4/letter/c/cc9497/32.png) [@Cial303](https://forums.steinberg.net/u/Cial303)\ **Post date:** [December 3, 2020, 9:27am UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599/1 "2020-12-03T09:27:10Z")
Hi, I’m working on a song on Cubasis 3.13. On Wed 02 Dec 2020 I opened the project and Pure Acid baseline synths sound different. I checked the version history of Pure Acid and on Tue 1 Dec 2020, there was the 1.5.0 update that adds MIDI out to Pure Acid. I was lucky to contact the developer JimAudio to ask about the issue. I sent him two audio mixdowns: one from Monday 30 Nov 2020 and another from Wed 02 Dec 2020. The project was completely unopened/unedited between those days. (I can provide audio clips via DM if requested) Jim answered me: > “I hear that pitch is changed up 7 semitones. also, slides absent in the second file. slides mean Gate knob has changed somehow” I sent him the preset that I am using and he confirmed that there was no problem with the stand-alone App and no issues with Cubasis 2 either. I checked on my iPad and I can confirm there are no issues on Cubasis 2 and with the stand-alone Pure Acid App. Jim also note: > "it also not remembering knob values after closing Cubasis > seems like something wrong with Cubasis 3. In Cubasis 2 everything seems to work without problems > you can try to ask here about PA with Cubasis 3: > [Pure Acid by Jim Audio!!! This is the best news ever!!! - Page 51 — Audiobus Forum](https://forum.audiob.us/discussion/34910/pure-acid-by-jim-audio-this-is-the-best-news-ever/p51)\> " On that forum, other users are experiencing the same weird behavior: > “Anyone having weird issues with Cubasis 3 with PA? It seems very unstable, while Cubasis 2 works good. > Just fired it up for the 1st time. Air 3 latest OS. > Writing midi note data to Cubasis 3 accurately from sequencer. \> **Baseline synth controls are all way off** \> but I have no idea if this is right or wrong. > Drums write midi data accurately to Cubasis too.” I don’t know if the issue has something related to the Known Issue “_ **CBT-317** MIDI event changes are ignored during playback._” In that case, could I know when it’s expected to release the corresponding maintenance fix? I’m very happy using Cubase 3 on my iPad. Feels like sci-fi to be able to work in a truly full-desktop environment while on the go or resting on the sofa; it’s game-changing. Despite the different stability issues I am currently experiencing and the considerable amount of bugs listed in the forums, I appreciate the potential of Cubasis 3 and I keep in mind that’s an early version written from scratch. I encourage you to keep doing great work! 👍 ---
**Author:** ![LSlowak](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/lslowak/32/2_2.png) [@LSlowak](https://forums.steinberg.net/u/LSlowak)\ **Post date:** [December 4, 2020, 4:50pm UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599/2 "2020-12-04T16:50:03Z")
Hi Marcal\_net, Thanks for your message. The next Cubasis update will be released in a few weeks from now, and includes many AU related performance improvements. If possible, please recheck the issue with the new update and let us have your updated feedback. Thanks, Lars ---
**Author:** ![Cial303](https://avatars.discourse-cdn.com/v4/letter/c/cc9497/32.png) [@Cial303](https://forums.steinberg.net/u/Cial303)\ **Post date:** [December 21, 2020, 7:50pm UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599/3 "2020-12-21T19:50:30Z")
Hi Lars, I have updated to 3.2. and unfortunately, the MIDI issue with Pure Acid 1.5.0 is not fixed with the update. I read the list of 45+ improvements of the 3.2 and the Known Issue “ _ **CBT-317** MIDI event changes are ignored during playback._ ” is not listed there. I hope it will be included in the next maintenance update. **Audio Engine Latency FEEDBACK** Following with 3.2 update feedback, after reading the announcement of " **Multicore-rendering and improved Audio Unit performance**", I’m experiencing just the opposite: in my iPad Air 3 (2019), on the same track, while the CPU usage remains low, the DSP usage raised considerably from a 40-50% to an 80% with lots of cracking when playing. I realised the issue is directly related to the “_Audio Engine Latency_” option. Switching OFF “Prevents crackling” and leaving the option as “Multi-core Rendering disabled” **fixes the cracking.** As always, congratulations on the improvement work you do with Cubasis; I wish you could release a maintenance update in the short-term. ---
**Author:** ![Cial303](https://avatars.discourse-cdn.com/v4/letter/c/cc9497/32.png) [@Cial303](https://forums.steinberg.net/u/Cial303)\ **Post date:** [January 2, 2021, 11:54am UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599/4 "2021-01-02T11:54:29Z")
Hi Lars, I have updated to 3.2. and unfortunately, the MIDI issue with Pure Acid 1.5.0 is still present with the update. I hope it will be included in the next maintenance update. I really enjoy the improvements of the new version. Great work! ---
**Author:** ![LSlowak](https://dub1.discourse-cdn.com/steinberg/user_avatar/forums.steinberg.net/lslowak/32/2_2.png) [@LSlowak](https://forums.steinberg.net/u/LSlowak)\ **Post date:** [January 11, 2021, 1:15pm UTC](https://forums.steinberg.net/t/pure-acid-and-cubasis-3-issue/587599/5 "2021-01-11T13:15:04Z")
Hi [Marcal\_net](https://forums.steinberg.net/u/Marcal_net), Please let us have a detailed step report, and share the issue with the app vendor too. Thanks & stay well, Lars