The M-Audio Transit Pro is a compact, audio output interface with both analog and digital output options. The Transit Pro is unique in that it supports DSD, or Direct Stream Digital playback. This guide discusses some common questions about the features and functionality of the Transit Pro.
- Does the Transit Pro require any drivers?
- Is the Transit pro supported for use on iOS?
- How do I set this up on Mac/Windows?
- How do I change the playback sample rate?
- How can I connect this to my speakers?
- What is DSD?
- Where can I get music in the DSD format and how can I play it?
- Why can't I play DSD files over the digital output?
- Further Technical Support
The Transit Pro is class-compliant for use with Mac operating systems, but will require a driver for use with Windows. Please check for the latest system requirements on the product page and download the latest available drivers from our Drivers and Updates page:
The Transit Pro will be supported for use on iOS, though it may require a power supply (sold separately) in order to be powered properly. It is only recommended to use the Transit Pro with an Apple certified Camera Connection kit and a power supply with the proper specifications. For specifications on the recommended power supply, please see the User Guide included in the box or available for download at the link below:
Setting up the Transit Pro as your soundcard is as easy as selecting it as your playback device in your system's Sound Preferences. Here's a quick way to do that:
- Download and install the driver from the Drivers & Updates page at M-Audio.com
- Navigate to your Control Panel
- Select Sound
- Under the Playback tab, find the Digital Output device labeled M-Audio Transit Pro
- Click the Set Default button at the bottom of the window to select it as your playback device
- Hit OK to exit the window
- Navigate to your System Preferences
- Select Sound
- Pick the Output tab at the top of your sound window
- Find and select M-Audio Transit Pro from the list of available output
Alternatively on a Mac, you can also hold down the Option key and click on the speaker icon at the top right of your screen to select your input and output devices.
On Windows, your playback sample rate, bit rate, and buffer size can be adjusted from the Transit Pro Audio Control Panel that will be installed along with the driver. This will be found in your programs folder or in your taskbar.
For Mac, you can adjust your sample/bit rate from your Audio/MIDI Setup. Here's how:
- Navigate to your Applications folder and the then your Utilities folder
- Find and open the Audio Midi Setup
- If you do not see a window appear, click on Window at the top of your screen and select Show Audio Devices
- Select the M-Audio Transit Pro from the list on the left
- Use the Format drop-down menu to select a new sample rate
For best results, choose your sample rate before opening your software for playback.
The Transit Pro features a single 1/8" (3.5mm) output that doubles as both an analog and digital (S/PDIF) output.
- For analog output, use the included 1/8" TRS to stereo RCA cable to connect the output directly to RCA line inputs on a pair of active speakers or to a stereo line input on your receiver.
- For digital output, use the included mini-toslink to toslink cable to connect to a digital optical input on your receiver or speaker system. Please note that this output uses the S/PDIF protocol and will not be compatible with ADAT inputs and outputs that use a similar optical cable.
DSD, or Direct Stream Digital is a format of high-resolution digital audio that somewhat rivals the standard PCM format, most commonly used by WAV files. PCM, or Pulse Code Modulation, uses a combination of bit and sample rates to determine and recreate the amplitude and frequency of a waveform to create a digital version. The higher the bit rate, the better dynamic representation and the higher the sample rate, the better the resolution.
DSD on the other hand only uses a single stream of bits, but at a much higher sample rate than PCM, starting at about 64 times the standard sample rate of a CD (44.1kHz) and jumping up 128 times or even higher. 64x and 128x may otherwise be known as 1x and 2x respectively, referring to multiplied values of the original 64x. This process of single bits and fast sampling rates would use the density of "on" bits and "off" bits to determine the digital structure of the sound. Because DSD is such a different approach to digital audio, it requires a different approach to it's conversion and playback, thus requiring DSD specific converters and interfaces. This is where the Transit Pro comes in to provide both PCM and DSD support in one simple package. As a DSD converter the Transit Pro will support both 64x (1x) or 128x (2x) playback.
Check out the sites below to learn more about DSD:
There are a growing number of sites that sell and distribute DSD files, including music that was entirely recorded and mixed in the DSD format. There are even some sites that offer free downloads as a way to get started with the format. Check out the list from DSD-Guide.com linked below:
Playing DSD files also requires a dedicated music player that can handle the files. Here are a few current options for Mac and PC:
- Foobar2000 - Support for PC
- JRiver - Support for Mac and PC
- Signalyst - Support for Mac and PC
- Audirvana - Support for Mac
Current digital playback and cabling formats, such as the Toslink output found on the Transit Pro, are all based around the standard PCM playback and sampling rates. These channels have limits to the amount of data they can carry and cannot handle the extreme rates of DSD. For this reason, the Transit Pro will not send DSD playback out through the digital output.
Whether you are a customer or dealer, if you already own an M-Audio product, or if you just have pre-sales questions, the M-Audio technical support team is available to help!
Visit the link below to connect with any of the following support options: online community support, phone support, email support.