![]() ![]() This way, when you open a project in a DAW, the audio interface should change to match the project sample rate, and therefore change the sample rate of all the slave devices. Quite often the best device to set as the master is the one that is connected to the computer (where possible) such as a ProTools Rig or an audio interface. Choosing a Master DeviceĬhoosing the master device is usually very flexible. Just like a designated driver on a night out, this unit keeps the whole crew under control. To provide this clock signal there needs to be just one unit that is designated to send the clock to the rest of the units. When you start to add even more devices to the chain, all these devices need to be working on the same clock signal, just like a long chain of cogs in a row all spinning at the same speed. If one is spinning faster than the other, the teeth will not interlock and things will go haywire just like your audio will if your equipment isn’t clocked together correctly. They have to be spinning at the same rate for the cogs to mesh together. This is known as ‘Clocking’ two devices.Ī simple analogy explaining the need for syncing two devices with a clock signal is by imagining two spinning cogs. Multiple devices need to be synced so all your devices are reading and playing back audio at the same rate. However, when you start to add multiple units it becomes a little more complex. When you are only looking to use one unit, such as an audio interface, you don’t really have to worry too much about clocking, most interfaces and operating systems will work all this out for you. On Audient products we use high quality crystals and circuits called a Phase Locked Loop to make sure that we keep our Jitter and Drift is kept as low as possible and your audio is kept super clean! Single and Multiple Devices ![]() If the clock slowly changes over time then this is known as drift and just like Jitter, can cause your audio to not be captured or played back accurately and cause distortion. ![]() The smaller the jitter amount, the more accurately the capture and playback will be and the nicer the audio will sound (well in theory… but that’s a whole different argument). The accuracy of the clock is known as its ‘Jitter’ and is measured in nanoseconds or less. Having a steady clock signal controlling your convertors is therefore crucial to ensure perfect capture of the audio and then nice clean playback afterwards. These samples need to be taken at specific steady intervals so that when the data is converted back into analog data, we can be sure that the conve. Samples are taken many times a second, 44,100 times a second in the case of a CD (often referred to as 44.1kHz). To take analog audio and make it digital, we simply take periodic samples of the audio signals amplitude and then send on as a series of ones and zeros which a computer or other digital device can use. Simply put, in the world of A to D and D to A conversion, the digital signal needs to be clocked accurately to prevent nasty sounding distortion. Clocking together digital devices is often seen as a bit of a mysterious dark art, especially when the setups start getting more and more complex. ![]()
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