For use with MovieSlate’s optional Timecode Sync Plugin.
Apple Headphone Jack Adapters.
Some newer iOS devices lack a headphone jack, so Apple sells Lightning and USB-C adapters which will allow your iOS device to accept TRS and TRRS headphone cables.
Apple Lightning to 3.5 mm Headphone Jack Adapter
If your iOS device has a Lightning port, and lacks a headphone jack (or its headphone jack is non-functional), then you can use Apple’s adapter to connect most TRS and TRRS headphone cables to your iOS device’s Lightning port.
Apple USB-C to 3.5 mm Headphone Jack Adapter
If your iOS device has a USB-C port, and lacks a headphone jack (or its headphone jack is non-functional), then you can use Apple’s adapter to connect some compatible TRS and TRRS headphone cables (see below) to your iOS device’s USB-C port.
USB-C Compatible Cables/Adapters
Not all TRS and TRRS cables will work on iOS devices with USB-C ports. Here are some that we have tested and found to function properly for receiving LTC timecode from external sources:
Rode SC4 3.5mm TRS to TRRS Microphone Cable Adaptor
Run an unattenuated TRS cable from your LTC timecode source → to this Rode SC4 adapter → to “Apple’s USB-C to 3.5 mm Headphone Jack Adapter” → to your iPad.
Movo MC3 3.5mm TRS to TRRS Adapter
Run an unattenuated TRS cable from your LTC timecode source → to this Movo adapter → to “Apple’s USB-C to 3.5 mm Headphone Jack Adapter” → to your iPad.
SYIHLON USB C to Headphone Jack Adapter
Run an attenuated TRRS cable from your LTC timecode source → to this SYIHLON adapter → to your iPad.
Sources for the attenuated timecode cables for iOS.
Here is a list of cable options that we know or customers have indicated to work:
Remote Audio BNC plug to 3.5mm TRRS plug (Model CATCiPBNC)
Remote Audio 5-pin Lemo-style M to 3.5mm TRRS plug (Model CATCiPL)
Remote Audio XLR3F to 3.5mm TRRS plug (Model CATCiPXLRF)
Many MovieSlate users have reported success sending and receiving timecode audio
wirelessly using transmitters and receivers like those from Comtek.
workflow is to cable-connect the LTC output from a sound recorder to a
wireless transmitter. Then cable-connect a wireless receiver to the iOS device(s)
Cables for sending timecode.
When sending timecode from MovieSlate, use a standard, unattenuated cable— which
you can purchase just about anywhere.
Cables for receiving timecode.
When receiving timecode in MovieSlate, use a custom, attenuated cable as
described below. Below are the three variables to take into account for
the receiving cable:
Headphone jack at the iOS end of the cable
On the Apple iOS device end of the cable, this jack must be one with four distinct silver bands (as pictured at right).
Without those four bands, an iPad/iPhone/iPod touch won't be able to accept audio input.
Denecke has also posted a PDF
with the specifications for connecting LTC devices to the iPhone / iPad / iPod Touch.
Jack at other end of the cable
This jack must fit the sound source (such as your TC generator or sound
recorder). Your sound source’s manual is a good place to find the type of
plug required. Failing that, you could Google for that information.
the volume of the audio
that the Apple iOS device receives. Depending upon your sound source, you
may not need any attenuation. However, most pro-level sound equipment
outputs at LINE level (very loud). All Apple iOS devices receive audio at
MIC level (very quiet). If your sound source outputs LINE level audio,
then it will easily overpower the poor Apple iOS device. So the audio
must be attenuated (quieted). Attenuation may require a bit of trial
and error. Not all sound sources (cameras, TC generators, and sound
recorders) output audio at the same volume levels. If your sound
source has an output volume control, then it is easy to test from
MovieSlate’s Settings > Timecode Syncing > Test Headphone Connection.
While viewing MovieSlate’s test screen, simply adjust the soure source’s
volume until the test screen levels are green and timecode appears in the
test screen. Some sound sources don't have a way to control their output
volume. In these cases, if you find that the volume is too high for the
Apple iOS device, then you'll need to also purchase an attenuating cable.