Hi, I’m a long time Sampletank user, new to the forum. I’m using Sampletank 4 with a Mac mini, Apple M4, Sequoia 15.6. I work in Digital Performer. The plug in upon opening is 1/2 tone under. Ie: if I"m playing an A, I’m hearing an Ab. I have checked all other plug ins and no others are doing this. I have checking tuning functions, transpose etc in the plug in itself, both master and individual instruments. Whether I open a new session template or a session I have been working in, the same thing happens. If I close and reopen, shut down, restart etc. Same thing. The only way to get it to A440 is to actually retune if from the master or from each instrument. . I’ve also checked any mod wheels etc, to make sure nothing is stuck. But again, it’s happening only in Sampletank and no other plugins. Is anyone having this issue?
I will check on my system. I never noticed this but then again, i never really. checked and always assumed its tuned.
Hi, I had a bit of time to check this. I didn’t find it was under tuned. I tested a few factory SampleTank acoustic pianos. I turned off any effects and checked with tuner in my DAW. They all seemed in tune. You may want to check your settings as it could be something else that is causing it.
From my research this far it may have to do with what kind of computer you’re using. I have a Mac mini that is rather new. I don’t know if this is part of the problem, but I suspect it may be, which means there might be nothing. I can do about it until it is addressed my sample tank. I’ve reached out to customer support, but have not had a response yet.
Many people use Mac Minis for music production, I’d be VERY surprised if SampleTank on a very specific computer is the issue. I’m sure support will help figure it out.
Does this help? From Google’s Gemini (with apologies) :
Your ear is entirely correct: a 1-semitone drop is exactly what happens when a specific form of sample rate rounding or a clocking mismatch occurs in this environment.
While the raw mathematical drop from 48 kHz to 44.1 kHz is 1.47 semitones (almost exactly halfway between a half-step and a whole-step), hearing a precise, clean 1-semitone drop in Digital Performer using SampleTank 4 points to a specific internal settings conflict on your Mac.
Why You Hear Exactly 1 Semitone Down
This issue occurs because Digital Performer and macOS Core Audio are conflicting over pitch correction and clocking, creating one of two scenarios:
DP’s “Automatic Conversion” is partially fighting the playback: Digital Performer features background pitch/time-stretching engines (like ZTX PRO). If your DP project is set to 44.1 kHz, but your Mac mini’s hardware audio clock or SampleTank’s internal engine is forced to 48 kHz, DP attempts to stretch or conform the incoming audio dynamically. It rounds the mathematical 1.47 semitone error to the nearest standard musical interval—1 semitone.
SampleTank 4 Engine Resampling: Inside SampleTank 4’s Edit panel under the “Type” tab, the engine can be set to either Resample or Resynth. If it is trying to resolve a hardware mismatch on Apple Silicon via virtual conversion, it will often snap to the closest chromatic pitch rather than a microtonal detune to keep the instrument playable.
How to Fix It in Your Setup
To get your A note back to its true pitch, ensure your hardware interface, macOS settings, and Digital Performer project all share a uniform sample rate.
Step 1: Check Digital Performer’s Project Settings
Go to Setup > Configure Audio System > Configure Hardware Driver.
Look at the Sample Rate dropdown.
Note whether it is set to 44,100 or 48,000. (If it is red, it means a sample rate conversion conflict is currently active).
Step 2: Match macOS Audio MIDI Setup
Because you are on a Mac mini, macOS handles hardware allocation dynamically. If the OS disagrees with DP, pitch shifts occur.
Press
Cmd + Spaceto open Spotlight, type Audio MIDI Setup, and press Enter.Select your audio interface from the left sidebar.
On the right side, look at the Format dropdown.
Force this number to match the exact sample rate you found inside your Digital Performer project settings in Step 1.
Step 3: Clear DP Background Processing Cached Pitch
If the file was imported as a soundbite and DP hard-cached the 1-semitone shift:
Open the Soundbites window in DP (
Shift + B).Right-click the affected sample or track.
Select Convert Audio File.
Uncheck “Only Change the Files Recognized Sample Rate” and convert it cleanly to match your project profile
Of course, proceed at your own risk and only if you understand exactly what you are doing.
Thank you so much for that information. I had also researched this and double checked the sample rates. They are both are at 48. So this doesn’t seem to be the issue.
As I continued researching this issue, the last thing I found was the possible problem of having an Intel computer. It’s been around two weeks and I have still not heard back from sample tank. Without a number to call the only workaround I have found is to manually tune each instrument in sample tank that I’m using.
I am on a Mac Mini M2 a few years old. How can you have an intel mac mini? They are all silicone now. I do have an old Mac Mini intel DAW that I could check. But I still think this is something else that might be causing it. As stated, check all the possible sample rate settings in the chain.
Yes, you’re right. I misstated. It is a silicone machine. I have not only checked the sample rates, but I’ve had my studio tech check the sample rates. They are not the problem. The problem continues to persist without solution, other than tuning each instrument manually.
what are you using to check tuning? a tuner all within the DAW or something else?
I used an external tuner, but also I checked against other plug-ins by playing an A in each to see if Sampletank was the only one out of tune.. It’s clear it was a 1/2 one off. i’m a vocalist so my ear told me that before I ever checked it via a tuner.
I just use the tuner vst instance in my DAW and it shows no deviation from A440.