Hi, I did some tests with my KPA, since I had the feeling recordings could be a little tighter aligned to my drum-programmings. So, here are my findings:
(Constant Latency = ON), Focusrite 6i6, Reaper 44,1kHz
1) Recording (equivalent to a standard live recording Guitar->KPA Input connected to my 6i6):
- KPA settings
- KPA Input/Input Source = “Front Input”
- KPA Output/Direct Output = “Guitar Analog” (->Bypass KPA)
- KPA Output/SPDIF Output = “Git/Stack”
- switch off Stomp/Amp/FX-sections (original signal stays unaffected)
- Play Track 1: suitable sample (e.g. square wave or snare hit)
- Send 6i6:LineOut1 -> KPA:FrontInput
- Record on Track 2: KPA:DirectOut -> 6i6:LineIn3
- Recording -13 (minus!) samples (early/in Reaper aligned before source-sample, probably 6i6-driver-calculation-error)
- Record on Track 3: KPA:MainOut -> 6i6:LineIn4
- Recording 203 Samples late (consistent with the 4,9ms latency pronounced by C.Kemper, considering the 6i6-driver-calculation-error of -13 Samples)
- Record on Track 4: KPA:SPDIF_Out -> 6i6:SPDIF Left (Guitar Studio/DI)
- Recording 362 Samples late
- Record on Track 5: KPA:SPDIF_Out -> 6i6:SPDIF Right (Stack)
- Recording 362 Samples late
2) Reamping:
- KPA settings
- KPA Input/Input Source = “Front Input”
- Play Track 1: suitable sample (e.g. square wave or snare hit)
- Send to 6i6:SPDIF Out->KPA:SPDIF In (Reamp)
- Record on Track 6: KPA:SPDIF_Out -> 6i6:SPDIF_In Right (Stack)
- Recording 420 Samples late
That means for me and my environment to get all KPA-recorded tracks aligned automatically:
- To be save, Constant Latency always ON
- Monitoring with KPA:MainOutput->available 6i6:LineIns – 4,9ms latency
- Settings in Reaper to align recordings/reampings automatically
- Options/Preferences/Audio/Recording/Use audio driver reported latency = ON
- Output manual offset: 58 samples, compensating for the additional reamping-delay over 6i6:SPDIF Out->KPA:SPDIF In
- Input manual offset: 362 samples
--> Result, no more nudging necessary after Recording
What do you think – I hope this makes sense and there’s no misconception on my side?