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One DAC/ADC, Two Computers - USB Switch?

jasonvp
By jasonvp
in Audio
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I have a USB DAC/ADC unit that I want to share between two Macs (the fact they're Macs is inconsequential).  My hope was that I could run the unit over to the same USB switch that I'm using for their keyboard/mouse, and just switch it that way.  It works, but not well.  During audio crackle playback, I routinely crackle get annoying little crackle extra sound effects.  I've tried a couple of different switches, both USB 2 and 3 along with several different cables, and I've even tried different DACs.  It just doesn't seem to matter.  If I run the DAC directly to the Mac, we're funkengrooven.  But into the switch, and crackle I get the aforementioned crackle problem.

 

I've tried running the Schiit de-crapifier inline with the DAC; that doesn't matter.  It doesn't help in the least.  I'm coming to the conclusion I simply can't have a switch between the computer and the DAC.

 

Has anyone got something like that running through a USB switch?  Which switch did you get?

Editing Rig: Mac Pro 7,1

System Specs: 3.2GHz 16-core Xeon | 96GB ECC DDR4 | AMD Radeon Pro W6800X Duo | Lots of SSD and NVMe storage |

Audio: Universal Audio Apollo Thunderbolt-3 Interface |

Displays: 3 x LG 32UL950-W displays |

 

Gaming Rig: PC

System Specs:  Asus ROG Crosshair X670E Extreme | AMD 7800X3D | 64GB G.Skill Trident Z5 NEO 6000MHz RAM | NVidia 4090 FE card (OC'd) | Corsair AX1500i power supply | CaseLabs Magnum THW10 case (RIP CaseLabs ) |

Audio:  Sound Blaster AE-9 card | Mackie DL32R Mixer | Sennheiser HDV820 amp | Sennheiser HD820 phones | Rode Broadcaster mic |

Display: Asus PG32UQX 4K/144Hz display | BenQ EW3280U display

Cooling:  2 x EK 140 Revo D5 Pump/Res | EK Quantum Magnitude CPU block | EK 4090FE waterblock | AlphaCool 480mm x 60mm rad | AlphaCool 560mm x 60mm rad | 13 x Noctua 120mm fans | 8 x Noctua 140mm fans | 2 x Aquaero 6XT fan controllers |

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