Issues with Cakewalk and USB UAD Twin mk I

[Cristiano Sadun]

I've been using CW for ages with a rock solid RME PCI setup. Lately I've moved and I haven't set up yet for the outboard and the 18 channels of I/O that were needed for them before. So for the moment I've set up one pc as all-in-the-box setup with one of my USB interfaces, an old UAD Apollo Twin mk I - which so far has been working just fine for non-production tasks. 

Today I thought of making a demo and opened Cakewalk. 

What I experience is that playback works fine, but when the transport stops, the software hangs for several seconds.
This happens also for a very minimal project with just EZ drummer loaded up in an instrument track and nothing else.

Some facts:

• Cakewalk version is 2024.07 (not the most recent update, but fairly recent)
• The UAD driver/console/plugins version is also recent (11.5.0 10-03-2024 build 173918)
• I'm using the ASIO driver (but the behavior is the  same with wasapi ex for example).
• The RME PCI card is still in the pc, but the RME DSP driver is not loaded in Windows (regardless the Twin uses USB)
• The same PC with Cakewalk was running perfectly with the RME PCI interface.
• I've assembled this setup in a bit of a hurry so I'm not positive the Twin is connected to a USB3.0 port but it shouldn't really matter as 3.0 only gives more bandwidth and I've just one track.
• It does not matter if the playback stops because I push the "stop" button or because CW reaches the end of the track - the hang always happens
• CW does not crash - it simply hangs. Is 

I've not used this particular PC  with a USB interfaces before (other than as a platform to run UAD plugins), but I've used other pcs with various USB interfaces I own, and never seen this kind of issue.

Any ideas? Also a couple of specific questions:

1. Does this kind of "hang for a while after playback"  sound familiar to someone?
2. Is there any parameter in the configuration file that's worth looking at tweaking? My current AUD.INI looks like this (after a reset)
   
   [Universal Audio USB (11 in, 5 out)]
   InputLatencyOffset=0
   UseAsioReportedLatency=1
   MME.DriverMap.UseWaveOut1=1
   MME.DriverMap.UseWaveOut2=1
   MME.DriverMap.UseWaveOut3=1
   MME.DriverMap.UseWaveOut4=1
   MME.DriverMap.UseWaveOut5=1
   MME.DriverMap.UseWaveIn1=1
   MME.DriverMap.UseWaveIn2=1
   MME.DriverMap.UseWaveIn3=1
   MME.DriverMap.UseWaveIn4=1
   MME.DriverMap.UseWaveIn5=1
   MME.DriverMap.UseWaveIn6=1
   MME.DriverMap.UseWaveIn7=1
   MME.DriverMap.UseWaveIn8=1
   MME.DriverMap.UseWaveIn9=1
   MME.DriverMap.UseWaveIn10=1
   MME.DriverMap.UseWaveIn11=1
   [Aud]
   DataDir=C:\Cakewalk Projects\Audio Data
   PictureDir=C:\Cakewalk Projects\Picture Cache
   [Wave]
   DefaultSampleRate=44100
   DriverID=0
   WaveInID=0
   OpenInputFirst=0
   SmpteMode=1
   TimingOffsetMsec=0.000000
   TimingOffsetBuffers=0
   LatencyMsec=23.219955
   BounceBufSizeMsec=0
   AlwaysStreamAudioThroughFx=1
   MaxInputChannels=16
   MaxOutputChannels=16
   ThreadSchedulingModel=1
   TransDetectorModel=2
   TransDetectorUpgraded=1
   EnableMixThreads=1
   MixThreadCount=0
   EnableSetThreadIdealProcessor=1
   EnablePluginLoadBalancing=0
   MinPluginLoadBalancingBufferSamples=128
   CSUseSpin=1
   AllowOfflineRenderMixThreads=1
   UseMMCSS=1
   EnableMMCSSforASIO=0
   MMCSSThreadPriority=2
   MMCSSTaskKey=Pro Audio
   FreeMemOnUnload=1
   AlwaysOpenAllDevices=0
   MinimizeDriverStateChanges=1
   RemoveDCOffset=0
   EnableAsioBufferSwitchTimeInfo=1
   EnableDeviceOutputLatencyCompensation=1
   UseHardwareSamplePosition=1
   BitsPerSample=24
   FileBitDepth=16
   RenderBitDepth=32
   ImportBitDepth=0
   ExtraPluginBufs=0
   MixDezipperUsec=50
   GapDezipperUsec=500
   WaveInBuffers=8
   WaveOutBuffersMME=4
   WaveOutBuffersKS=2
   MeterFrameSizeMS=40
   SyncMaxDriftMsec=2
   SyncDivisor=8
   ProfiledMME=0
   ProfiledKS=0
   ProfiledWASAPI=0
   UseWDMDmaForWASAPI=1
   LinkSendPan=0
   LinkPFSendMute=0
   StopOnEmptyPlayQueue=0
   KsUseInputEvent=0
   WaveOutExtraBuffers=1
   AutomationDecimationMsec=5
   EnableSSEMixing=1
   ThumbnailCacheSize=100
   EnableLiveADCRecalc=1
   UseAlias=0
   DropoutMsec=250
   MaskDropoutDetection=0
   StartFadeMsec=0
   StopFadeMsec=0
   PanLaw=0
   PanLawCompatMode=0
   DisableIMDuringPlay=0
   ShowMultiChannelInputs=1
   ShowMultiChannelOutputs=1
   MaxPreviewMsec=300000
   EnableWasapiDSP=1
   RestartEngineAfterDropout=1
   [SampleRates]
   Count=11
   0=8000
   1=11025
   2=22050
   3=44100
   4=48000
   5=88200
   6=96000
   7=176400
   8=192000
   9=352800
   10=384000
    

[JonD]

Not all USB ports are the same.  They have different speeds, hubs, controllers -- using different hardware and software (as strange as that may seem).

It if's currently on a USB3 port (inner blue strip), I'd switch to a USB2 (black strip).  If that doesn't work just try other ports...