H I F I D U I N O

A reader sent me a few pictures of his I2S Mod

Over at diyhifi.org , user simmconn figured out how the clocks of the Musiland are synthesized (I've summarized here): The Xilinx FPGA...

Photo copyright CNN Twisted Pear Audio is sponsoring a raffle to support relief efforts in Haiti. Raffle will be held Wed January 20. Hurry...

Before... May this new year bring lots of joy to you and your families!

Decided to measure the LRCK line again to see if the waveform was cleaner. The picture speaks for itself. See the trace before here .

Elsewhere it has been measured that the DC-DC converters are a potential source for noise. Because I am not using the headphone output, I de...

Because the MCK for the Musiland devices is 128fs which is "not supported" by the WM8741 DAC (see previous post), I decided to use...

From the MCK compatibility chart we can see that for 44.1 KHz sample rate, 128fs is not supported in the Wolfson WM8741. But I wanted to try...

I've compiled the supported MCK for different DACs. One can see that measuring the ouput MCK from a source device like the Musiland is i...

So far we've measured two out of the 4 lines when using I2S. Strictly speaking, I2S only has 3 lines, but the Master Clock line is req...

Here is another way to measure frequency > 100 KHz. The 40-buck scope has a frequency feature that is good up to 5 MHz (It is probably go...

Another signal line that is required when using the I2S connection is the system clock (MCK or SCK). This runs in the many MHz range so you ...

One of the reasons I had to measure the I2S frequency was because I connected the MUSILAND 01-MINI to the WM8741 DAC by tapping the I2S line...

I decided to to some audio measurement with the scope. Measuring I2S was the perfect exercise as the different clocks are sent in separate w...

A pretty good scope for audio applications. Maximum analog bandwidth is 1 MHz. However, the maximum signal you can comfortably measure is 1/...

According to a Wolfson Engineer, OSR, it's the DAC-to-input-rate-ratio. We want that to be high to have the DAC run fast, but not too fa...

Some people can hear differences between the digital filters in the WM8741 DAC. In my setup, I can't really hear clear differences betwe...

NKC Electronics has released this little board to allow converting voltage levels between Arduino and other devices. Recall that Arduino is...

When I started my project, I posted in DIYAudio and got totally ignored. Fortunately other people recognized the potential of using Arduino ...

I think this is the first public project of Arduino controlling a Twistedpairaudio Buffalo DAC [ link ]