Edirol Ua 4fx Driver For Mac

This is a driver for using the UA-4FX with Mac OS X 10.6 (Snow Leopard). Compatible with Apple's standards of CoreMIDI; Universal Binary Driver (32-bit and 64-.

The format of this page is shamelessly copied from the EdirolUA-25 page, because that page is laid outso well.

The Edirol UA-4FX is a good quality audio device, with great features:

Variety of Input & Output options
Balanced Input & Output
Two Professional Grade Mic Preamps
Built-in Digital Signal Processor with some FX processingcapabilities
Zero-Latency, Direct Monitoring
USB Bus-Powered
Phantom microphone power (48 volts)
Full-duplex audio capture and playback at 48kHz and 24-bit samples
Half-duplex audio capture and playback at 96kHz and 24-bit samples(switching between capture or playback requires a hot or coldreboot)
MIDI I/O (support added in linux-2.6.28) Here is the originaldevelopmentwork

I hope that this little howto can guide you and save you some time. Thelogic of the Edirol UA-4FX is that it is operated by hands, directly onthe device. There are some hardware limitations, but it is frankly avery nice tool.

The Edirol UA-4FX is partially supported by Alsa: the device isrecognised by the snd_usb_audio module. You can play and record at44.1kHz and 16-bit samples if you have set the Advanced Driver switch tooff. Full support for 24-bit playback and recording at rates up to96 kHz has been successfully tested using the patchbelow.

Unfortunately, Alsa has little control over this device.

In fact, it is not a problem of operating systems (Linux / FreeBSD /Window), but rather a hardware issue. For example, Input level, Outputlevel, mixing, even sample rate are controlled at the hardware level.There is no software control. Some users may like this old-fashion wayof managing a sound card. Others may dislike it. Analyse your needsbefore purchasing this sound device.

The Edirol UA-4FX is designed to be a simple mixing board. That is whythe input and output levels are controlled by knobs and not software.

Fortunately, Alsa offers a variety of features andplugins, which emulate at softwarelevel the missing features. This is the advantage of Alsa over othersound systems.

Understanding the Edirol UA-4FX logic

At first, you should have a look at the back pane. Or look at the photoof the device. Try to locate three important buttons:

Advanced Driver toggle switch

On the left side of the UA-4FX, there is an on/off switch called'Advanced Driver', which controls the USB mode of the device.

In advanced mode (Advanced Driver switch ON), the UA-4FX can recordor play sound in native 24 bits, in either 44.100 Hz, 48.000 Hz or96.000 Hz sample rates. You can choose sample rates using a switchnext to the Advanced Driver switch. At 96 Khz, the device is eithercapture or playback only. MIDI is enabled. Advanced mode support wasadded in 2.6.28, seebelow.
In normal mode (Advanced Driver switch OFF), the UA-4FX is fully USBsound compliant. It records at the rate of 44.100 Hz, in 16 bits,and is full-duplex. MIDI is disabled.

Sample rates switch

On the left side of the UA-4FX, there is a switch button called 'SAMPLERATE'. The switch has four values: 44.1 kHz, 48 kHz, 96 kHz RECORD, and96 kHz PLAY:

With Advanced mode OFF, the device will always record/play nativelyat the rate of 44.1 kHz using 16 bits.
With Advanced mode ON, the device will be able to record using 24bits. Choose the sample rate using the SAMPLE RATE switch:
- 44.1 kHz: play and record at the same time,
- 48 kHz: play and record at the same time,
- 96 kHz: play OR record, but not both.

Cold/Hot reboot

Whenever you switch from Advanced ON to Advanced OFF, change samplerates, or change from 96 kHz RECORD to 96 kHz PLAY, you will either needto:

cold reboot: Unplug the USB cord, plug it again. The hotplugmechanism will remove all snd modules and will reload them. Bewarned : frequent plug/unplug may harm the device physical contacts.
shutdown/reboot your computer: it is the recommended way, as it willnot harm your device (or the USB cord). Your computer might not turnoff the USB power unless you shut down completely. A good place toswitch the Advance button is during the grub menu, if you are usinggrub, and if that fails, shut the computer off completely to switchthe Advance button.

Lost?

To understand advance mode, sample rates and REC/PLAY, it is recommendedto use aplay and arecord in verbose (option -v) mode. This is whatwe will do during the howto. This will clearly show you how the audiodevices plays and records sound.

Basic Alsa configuration

alsaconf is not required to use the Edirol UA-4FX. Hotplug is able torecognise the audio device. Just plug and play.

Assigning audio system rights

GNU/Linux is a secure system. To play sound, you need audio systemrights. To query your systems rights:

In this example, I don't have enough rights to play/record sound. Toassign rights:

Become root (system administrator):

Enter the administrator password and then:

Will add the user my_username (replace with your username) to theaudio group. You should be able to play music.

Naming the Edirol UA-4FX device

If the UA-4FX is the only device of your computer, you can address thedevice using the plughw:0,0, but it is not very convenient. Werecommend using the alphanumeric name of the device. To query the nameof your device, type:

Here, you should use plughw:UA4FX rather than plughw:0,0

Testing sound output

Test the card output. This command plays a woman voice on 2 channels('Front Right', 'Front Left'):

Playing sound

You can play any sound and it will be played with a sample rate of 44.1Khz.

To play a sound:

For a better understanding, it is recommended to play in verbose mode:

Several lines of text will explain what Alsa is doing:

The sound file has a 44.100 Hz sample rate and 16 bits of resolution.

When playing two sounds at the same time, an error message is displayed:

You can play sounds at higher sample rates and 24-bit precision usingAdvancedmode.

Recording sound

With the UA-4FX device set to Advanced OFF, you can use the arecordutility from the Alsa package to record any sound from the microphone:

For a better understanding, try the same command in verbose mode:

The resulting message:

The Edirol UA-4FX is able to record in 24 bits, at the sample rate of 96Khz.

With Advanced modeenabled,playing a recorded sound at 96 Khz would not work:

At 96.000 Hz, the audio device can play OR record, but not both.

If aplay complains of 'No such file or directory,' it might be becausethe SAMPLE RATE switch is set to 96 kHz RECORD. Try changing it to 96kHz PLAY. You will then need to cold or hotreboot.

Now you should be able to play the sound:

Changing the switch (and enabling Advancedmode) isall that is needed to see something like this:

Remember, at 96.000 Khz, you can either play OR record, but not both.

Advanced Alsa configuration

The recommended settings in this HOWTO are now:

Advance mode : OFF

This will record/play sound in 16 bits, at the frequency of 44.100 Hz.

Full-duplex mode

The Edirol UA-4FX is a full-duplex device up to 48.000 Hz. WithAdvanced modeenabled,you can also set the UA-4FX to 96 kHz PLAY or 96 kHz RECORD. TheEdirol_UA-25 page suggests using theasym plugin to get full-duplex 96 kHz operation, but the UA-4FX hardwaredoes not support it.

Custom softvol PCM

$alsamixer -c 0 to use mixer settings on card 0 will return:

Unfortunately these is no software control over the hardware mixers onthe device (like in any USB device), nothing will show up in mixerprograms.

Fortunately, Alsa offers the softvolplugin to create a software volumecontrol. We will also define this control as the default mixer.

Here is my first try:

Let us have a look at our software mixer:

Recording left and right input channels seperately

When recording from two mono inputs (Input 1/L and Input 2/R), the soundis mixed into a stereo stream at hardware level. Becker indianapolis software 7.0. Again, there is nosoftware control over this audio device.

This is a problem when you only record from one mono microphone. Theresulting stereo sound includes a muted channel with noise. At softwarelevel, you may downmix this sound to mono, but this degrades qualitybecause of the muted channel with noise.

A simple solution is to record from left and right input channelsseperately, asexplained in the dsnoop howto.

Digital signals

The same rules apply here. Alsa has very little control over the UA-4FXhardware. Digital control is done using buttons on the front pane.

Digital In

To record from digital source, you must select DIGITAL from the RECSOURCE switch on the side of the UA-4FX (by the SAMPLE RATE switch).You can then record using any Alsa tool, on the pasymed or SoftMasterPCMs.

Digital Out

With the Edirol UA-4FX in Advanced mode off, you can play 16 bits,44.100 Hz digital output.

Let us try Alsa utility speaker-test:

Connect an optical cable:

from Edirol UA-4FX Digital out
to a Terratec USB Aureon MK-2 digital in.

In the mixer of the Terratec Aureon, select Input 2 and checkIEC958 In.

Record the digital stream using the following command:

Low latency (to be written)

Investigating. To be written.

MIDI configuration

I don't use MIDI instruments. This information comes from the UbuntuForums. You will needAdvanced modesupport.

For MIDI to work, make sure you are in Advancedmode byturning the Advanced mode switch ON located on the left side of theUA-4FX; you will need to unplug and plug in the device for the change totake effect.

If MIDI is working, you should see a 'raw midi' device for the UA-4FX in/proc/asound/devices:

Also, /proc/asound/card0/midi0 should exist (assuming the UA-4FX is the0th audio device):

MIDI ports

When the UA-4FX Advanced mode isenabled,aconnect should show one MIDI input and one MIDI output port:

If you prefer a graphical interface, check out aconnectgui. Therelevant information can also be found in /proc/asound/seq/clients.

Device information

The following section may help Alsa hackers:

cat/proc/bus/usb/devices

Please ignore the OHCI Host Controller and USB Optical Mouse listed inmy /proc/bus/usb/devices

cat /proc/asound/devices

cat /proc/asound/cards

aplay -l

Getting Advanced mode to work

Great Big WarningBarcode verifier software for mac.

Advanced mode offers 24-bit audio at high sample rates (48kHz fullduplex, and 96kHz half duplex). However, there's noise added by thehardware on purpose. To figure out how to disable this, which I supposeis for watermarking / DRM purposes, a reverse engineering effort wouldbe required.

I worked through these steps to get almost 100% support for Advancedmode. All that is missing is software-selectable Input Monitor whenthe switch is set to AUTO. (When it is set to ON, inputs are always sentto outputs.)

First, I checked /proc/bus/usb/devices. (I'm leaving out the OHCI huband USB Optical Mouse)

Next I checked the UA-25 DeviceInformation sectionand my usb listing seems close enough.

I made a patch, which works on linux-2.6.24 and linux-2.6.25. It lookslike tiwai included it in 2.6.28-rc3. Thanks! So instead of using thepatch on this page, please upgrade your kernel to linux-2.6.28 or later.

When I load snd_usb_audio now, I get the following in dmesg:

The snd_usb_audio driver correctly detects the playback and capturesample rate:

Switching to 48 kHz playback/recording, /proc/bus/usb/devices has athird alternate (Alt=2) for interface 0, and it has 1 endpoint:

So in createua700ua25_quirk() there's a change to the test foraltsettings. (It's in the patch, above.)

Obviously, at 96 kHz the interfaces list is quite different. Buteverything is detected fine, just like the UA-25. Tested MIDI detectionat 96 kHz RECORD, PLAY, 48 kHz, and 44.1 kHz, just fine:

Every once in a while, the UA-4FX initializes in an odd state:

Patch for 2.6.24 through 2.6.27

Here is a patch for /usr/src/linux-2.6.24/sound/usb/usbaudio.c andusbquirks.h. I have tested it on linux-2.6.24 and linux-2.6.25:

Roland - Support

All drivers available for download have been scanned by antivirus program. Read honest and unbiased product reviews from our users. Did you edirol roland um-2ex this review helpful? Mon, December 18, Transcribe!The UM-2EX is a simple USB MIDI interface offering one MIDI input & two MIDI EDIROL designs its USB devices in accordance with USB specifications and. UM-2 Driver Version edirol roland um-2ex Windows 7 bit Edition. This is the EDIROL UM-2 (UM-2EX) driver for Microsoft(R) Windows 7.

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