Premium SRCs | Product | AKM - Asahi Kasei Microdevices
AKM launched a web page for their new audio D/A,A/D, and SRC devices and started sample release.
Though their mass production will be started Q2 2015, their spec sheets look attractive.
New top grade DAC AK4490EQ are inproved 7dB of THD+N from AK4399.
New ASRC IC AK4137 have interesting feature,- PCM / DSD conversion function.
It also supports DoP input.(see register setting)
Although I personally do not prefer DSD, it is interesting IC.
AKM launched a web page for their new audio D/A,A/D, and SRC devices and started sample release.
Though their mass production will be started Q2 2015, their spec sheets look attractive.
New top grade DAC AK4490EQ are inproved 7dB of THD+N from AK4399.
New ASRC IC AK4137 have interesting feature,- PCM / DSD conversion function.
It also supports DoP input.(see register setting)
Although I personally do not prefer DSD, it is interesting IC.
It's ironical that PS-Audio are charging $6000 for similar technology !!
PS Audio PerfectWave DirectStream D/A processor | Stereophile.com
Yes, it would be very nice if one starts a very nice ADC & DAC HW specially tuned for measurement. To support 384 / 768 kHz feeding to the PC would be an other challenge 😀
Hp
Hp
yep... another product, additional info hopefully within next month https://translate.google.com/transl...i.net/read.php?tid=1715189&edit-text=&act=url
We are using AK4495SEQ(sound quality package) in our USB DAC. It is the best sounding AKM DAC chip.
🙂
An externally hosted image should be here but it was not working when we last tested it.
🙂
Aune S16 AK4495SEQ DAC
Aune is the "product division" of China's largest DIY website HIFIDIY ?????. I was their die-hard fans 6-7 years ago because they debut high price-value diy kits in China.
DIY kits come and go because there are always better-than-before kits coming out all the time. I can't remember how many kits I bought from them but there are; at least, two of them that I am still using today: -
CD Pro2 Transport
TDA1541 DAC
However, in recent years, they turn out to be more a manufacturer putting Aune as their products in the market. In my memory, there is only one diy kit in these two years that is attracting diyer's attention in the market - A ES9018 DAC jointly developed with ESS China. I seldom purchase their Aune product because they are not diy kits.
The above is true up to today that I can't help to purchase their S16 DAC because the spec is too attractive. I am posting a few of their pictures here as reference. S16 is developed based on AKM's AK4495SEQ. There is another driving force for this purchase because during my recent removal, I found my AKG 701 headphone sitting in a drawer that I don't have any headphone amp for it. S16 is having a headphone output that can bring my AKG 701 into live again. I am expecting to receive it within the next few days that as a diyer, I am always looking for rooms to improve.
I am using Weiliang's dual AK4399 digital section and Universal Tube Output from diyhifisupply as analog output today that; I believe, is the best DAC I ever have. I am longing to see if someone can work out a "public pcb" for AK4495SEQ (perhaps dual) so we can have a taste of newer technology from AKM.
Aune is the "product division" of China's largest DIY website HIFIDIY ?????. I was their die-hard fans 6-7 years ago because they debut high price-value diy kits in China.
DIY kits come and go because there are always better-than-before kits coming out all the time. I can't remember how many kits I bought from them but there are; at least, two of them that I am still using today: -
CD Pro2 Transport
TDA1541 DAC
However, in recent years, they turn out to be more a manufacturer putting Aune as their products in the market. In my memory, there is only one diy kit in these two years that is attracting diyer's attention in the market - A ES9018 DAC jointly developed with ESS China. I seldom purchase their Aune product because they are not diy kits.
The above is true up to today that I can't help to purchase their S16 DAC because the spec is too attractive. I am posting a few of their pictures here as reference. S16 is developed based on AKM's AK4495SEQ. There is another driving force for this purchase because during my recent removal, I found my AKG 701 headphone sitting in a drawer that I don't have any headphone amp for it. S16 is having a headphone output that can bring my AKG 701 into live again. I am expecting to receive it within the next few days that as a diyer, I am always looking for rooms to improve.
I am using Weiliang's dual AK4399 digital section and Universal Tube Output from diyhifisupply as analog output today that; I believe, is the best DAC I ever have. I am longing to see if someone can work out a "public pcb" for AK4495SEQ (perhaps dual) so we can have a taste of newer technology from AKM.
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Page P,
Does your DAC have other input options?
Are you using Opamp or discrete (BJT or FET) as analog output?
Does your DAC have other input options?
Are you using Opamp or discrete (BJT or FET) as analog output?
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Sunsun22: our website is in Czech language. We are working on the new multilanguage website.
It has only USB input - but fully asynchronous. It uses AD8065 with discrete buffer with no feedback on it's output.
It has only USB input - but fully asynchronous. It uses AD8065 with discrete buffer with no feedback on it's output.
The CT-7301C datasheet doesn't seem to mention about the interpolation filter response. That's something to be careful of as aliasing of time domain ringing from linear phase brickwall filtering seems to be the main sound quality limitation of most ASRCs. The AK4136 and 4137 that are part of this product line refresh from AKM are, to my knowledge, the only hardware SRCs with options other than brickwall. Wouldn't surprise me if they turn out priced high enough not to be competitive with the WM8805---the AKM distributor for my area doesn't have them listed yet---but they're certainly technically interesting parts.
Hi all,
Although preliminary datasheets the ADCs look really interesting to me - however, anyone knows of a reliable way of getting 768 kHz/32 bits INTO a PC real-time?
Cheers,
Jesper
Although preliminary datasheets the ADCs look really interesting to me - however, anyone knows of a reliable way of getting 768 kHz/32 bits INTO a PC real-time?
Cheers,
Jesper
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2x, 4x, 8x speeds
Well, currently I have not seen any spectrum how the ADC performs above 192kHz, as the noise shaping rising curve. If you compare the current specifications compared to the previous 192kHz ADC AK5394A: Only the power is half. Also the bit performance will be in the same 21..22 bit region and the benefit using 32 bit is for me still open. 🙄
I currently implementing for capture & render on ASIO/WASAPI an 2x, 4x, 8x speed feature using digital I/O, as I did 2x speed already on MMS/WDM interface. This means multi channels will be combined to get this 2x, 4x, 8x speeds. And external HW (like in a FPGA) is required to shift/split "x" I2S channels into the required stream format.
Currently I will build and test this using the miniDSP USBStreamer (8 channels I2S I/O).... as JensH suggested 😀
Hp
Well, currently I have not seen any spectrum how the ADC performs above 192kHz, as the noise shaping rising curve. If you compare the current specifications compared to the previous 192kHz ADC AK5394A: Only the power is half. Also the bit performance will be in the same 21..22 bit region and the benefit using 32 bit is for me still open. 🙄
I currently implementing for capture & render on ASIO/WASAPI an 2x, 4x, 8x speed feature using digital I/O, as I did 2x speed already on MMS/WDM interface. This means multi channels will be combined to get this 2x, 4x, 8x speeds. And external HW (like in a FPGA) is required to shift/split "x" I2S channels into the required stream format.
Currently I will build and test this using the miniDSP USBStreamer (8 channels I2S I/O).... as JensH suggested 😀
Hp
2x, 4x, 8x speed modes
Jesper,
attached a picture of my early adaptation/implementation 2x,4x,8x speed (based on used sample rate) implementation using the miniDSP USB Streamer & combine multiple channels (24 bit only) in ASIO digital loop back (I2S input & output with jumpers connected).
Picture 768 kHz sample rate, stereo using, 4x speed (HW sample rate 192 kHz) using individual sine waves at -8 dBFS...
Hp
Jesper,
attached a picture of my early adaptation/implementation 2x,4x,8x speed (based on used sample rate) implementation using the miniDSP USB Streamer & combine multiple channels (24 bit only) in ASIO digital loop back (I2S input & output with jumpers connected).
Picture 768 kHz sample rate, stereo using, 4x speed (HW sample rate 192 kHz) using individual sine waves at -8 dBFS...
Hp
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