Recent Posts

71

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by dannydigital on November 25, 2019, 10:58:50 AM »

I'm always interested in something truly different and unique.

T

I often wonder if anyone has ever attempted to build a semi-descrete DAC (no DAC chip) simply just using cmos logic, memory and analogue ccts on a large pcb. You could trim any part of the cct for whatever parameter you need at every stage.(Such as linearity)
This would be something different.
D

72

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by zenelectro on November 25, 2019, 01:33:54 AM »

Yes, but none of the new DACs come with any genuine crowns on them! 

I'll be trying another setup that I've been taking ages to put together, it consists of Lyubens AK4490 DAC stacked on top of the I2SOVERUSB board. I've got it layed out on an aluminium plate with some independent transformers & regulators and a J-FET o/p stage.
I'll post some photos if I get around to it.
D

Crowns - haha, very expensive ones.

WRT AK4490, I'm sure these are pretty good but it has all been done before. Clay is already making very good AKM based DACs

I'm always interested in something truly different and unique.

T

73

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by dannydigital on November 24, 2019, 10:00:41 PM »

Danny,

Mate, I have not used a CS8414  receiver chip for years so not sure, you'll have to check the data sheet. 

WRT clicks and pops, yes, that can be an issue. They are not really that loud, just annoying after a while.

I think it's time to move on from TDA1541, there are some good options out there now.

Terry

Yes, but none of the new DACs come with any genuine crowns on them! 

I'll be trying another setup that I've been taking ages to put together, it consists of Lyubens AK4490 DAC stacked on top of the I2SOVERUSB board. I've got it layed out on an aluminium plate with some independent transformers & regulators and a J-FET o/p stage.
I'll post some photos if I get around to it.
D

74

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by zenelectro on November 24, 2019, 11:12:12 AM »

Thanks Terry,

I'm Keen to build a TDA1541 DAC configured in simultaneous mode soon. This one I'm leaving in multiplexed mode as it will have the convenience of switching between spdif and USB inputs at I2S level and I haven't looked into whether the receiver chip can output simultaneous mode to suit the TDA1541.
Do you know if the CS8414 can be configured to o/p this mode?
Also, I'm a bit concerned about how bad the intialising/mode transitional pops are when operating in simultaneous mode as Lyuben recommends to use a muting cct in this mode (with his module). Have you observed any issues in this regard? Are you using muting in your setup?
Cheers,
DK

Danny,

Mate, I have not used a CS8414  receiver chip for years so not sure, you'll have to check the data sheet. 

WRT clicks and pops, yes, that can be an issue. They are not really that loud, just annoying after a while.

I think it's time to move on from TDA1541, there are some good options out there now.

Terry

75

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by dannydigital on November 21, 2019, 10:12:03 PM »

Danny,

WRT 'time multiplexed mode'  (simultaneous mode) I've had my TDA541 DAC ('eneterprise')
running at 384 kHz sample rate without any problems.

Terry

Thanks Terry,

I'm Keen to build a TDA1541 DAC configured in simultaneous mode soon. This one I'm leaving in multiplexed mode as it will have the convenience of switching between spdif and USB inputs at I2S level and I haven't looked into whether the receiver chip can output simultaneous mode to suit the TDA1541.
Do you know if the CS8414 can be configured to o/p this mode?
Also, I'm a bit concerned about how bad the intialising/mode transitional pops are when operating in simultaneous mode as Lyuben recommends to use a muting cct in this mode (with his module). Have you observed any issues in this regard? Are you using muting in your setup?
Cheers,
DK

76

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by zenelectro on November 21, 2019, 09:15:01 PM »

KillerDACtoUSB Preliminary testing of the setup and looking good.

Running I2S into the TDA1541A at 192kHz "(time multiplexed mode)" and sounding great!

So far meeting all expected functionality. I'm about to test an Android app with this. (USB Audio Player PRO)
There might be a way to make this work with the Raspberry Pie too. I'll try and look into it.(I'll have to find my pie..)

Danny,

WRT 'time multiplexed mode'  (simultaneous mode) I've had my TDA541 DAC ('eneterprise')
running at 384 kHz sample rate without any problems.

Terry

77

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by dannydigital on November 20, 2019, 12:34:33 AM »

KillerDACtoUSB Preliminary testing of the setup and looking good.

Running I2S into the TDA1541A at 192kHz "(time multiplexed mode)" and sounding great!

So far meeting all expected functionality. I'm about to test an Android app with this. (USB Audio Player PRO)
There might be a way to make this work with the Raspberry Pie too. I'll try and look into it.(I'll have to find my pie..)

78

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by data on November 17, 2019, 02:54:01 PM »

It all helps, thanks, Danny 

79

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by dannydigital on November 17, 2019, 11:26:42 AM »

Found the type of basic board that guy selling on ebay used, so I'll just use the same, and work out where to interrupt the signal (add a switch), so I better start reading up on i2s feeding TDA1541A. Not in a hurry, so have plenty of time to nut it out.

You can find the I2S bus on the tracks from pins 1, 2, 3 on the TDA1541A. Pin 1 is WS, pin 2 BCK, pin 3 DATA. Best way to switch it is using a logic cct, otherwise keep your leads as short as possible.
Hope this helps.

80

Transports / Re: Raspberry PI transport with I2S output into TDA1541A

« Last post by data on November 17, 2019, 04:12:59 AM »

Found the type of basic board that guy selling on ebay used, so I'll just use the same, and work out where to interrupt the signal (add a switch), so I better start reading up on i2s feeding TDA1541A. Not in a hurry, so have plenty of time to nut it out.