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In a first test, the TinyBox MIDI-USB latency is compared to the MIDI-USB latency of the
commercial interface.
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A MIDI cable is connected from MIDISPORT Out 1 to MIDISPORT In 1, a MIDI message
is sent to the MIDI-USB OUT 1 port and the same message is received on the MIDI-USB
IN 1 port. The delay between sending and receiving is measured. This test is repeated
1000 times to calculate the average latency and jitter (= difference between multiple
measurements), and it is done for 3 messages types (1-byte, 2-byte, 3-byte)
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The same test is done with the TinyBox, without any MIDI cable connected. The
TinyBox has built-in loopthrough functionality which forwards all incoming messages
from USB back to USB :
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The same test is repeated with the TinyBox, this time connecting a MIDI cable from
MIDI IN to MIDI OUT, in order have a test which is identical to the MIDISPORT test,
using the physical MIDI ports in addition to the MIDI-USB ports. ( Specific firmware is
created to run this test, as the standard TinyBox firmware goes into troubleshooting
mode when connecting a MIDI cable between MIDI IN and MIDI OUT )