iOS Audio Interface Comparison

Here we compare some of the popular iOS audio interfaces used during the development and testing of the LatencyMeter app.

Round trip latency for each interface was measured on iPhone 6s running iOS 11.

Sample rate of 48000 Hz and buffer size of 128 frames were set.

IK Multimedia iRig 2 (11.5 ms)

• Low-cost, single channel, analog guitar interface
• Has gain control and separate amp out
• Uses the headset jack (or dock connector with adapter)
• $39 USD [ Amazon ]

Griffin iMic (11.0 ms)

• Low-cost USB audio adapter
• 1/8" stereo input and output
• Requires camera connection kit
• $39 USD [ Amazon ]

Line 6 SonicPort (15.9 ms)

• 1/4" guitar/line level input and output
• 1/8" stereo input and output
• Uses the dock connector
• 99 USD [ Amazon ]

PreSonus AudioBox iTwo (9.6 ms)

• Studio-quality 24-bit resolution up to 96 kHz
• Two combo mic/instrument inputs with Class A mic preamps
• Two 1/4" TRS main and one headphone outputs
• Requires camera connection kit and USB power
• 149 USD [ Amazon ]

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