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- Users: atsukita
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Korg MR-1: Can this be used as a portable player?
MR-1 I2S out Mod MR-1 is nice digital audio player especially for High Resolution audio format but it has no digital out port unfortunately. I made modification of I2S digital out for my DAC. MR-1 use DAC chip DSD1702. http://focus.ti.com/lit/ds/symlink/dsd1702.pdf ...- atsukita
- Post #244
- Forum: Portable Source Gear
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Poll: Who uses an iRiver H1x0 with digital out?
Quote: I have no objective mechanical measurement result for these modification. Following is my impression. TOSLINK -> SPDIF: Noise floor improvement. High tone impacts are better. SPDIF -> I2S: This was big change. Center dizzy feeling was eliminated. Smashed feeling...- atsukita
- Post #62
- Forum: Portable Source Gear
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Poll: Who uses an iRiver H1x0 with digital out?
Quote: No. No sampling rate will be changed for output. 16/44.1 is iHP's max. sampling rate. I think better jitter elimination is performed by higher frequency clock.- atsukita
- Post #60
- Forum: Portable Source Gear
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Poll: Who uses an iRiver H1x0 with digital out?
Quote: Better resolution sound. This crystal is audio master clock for CPU. Be realized any connection.- atsukita
- Post #58
- Forum: Portable Source Gear
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Poll: Who uses an iRiver H1x0 with digital out?
Crystal resonator replacement 11.2896MHz -> 33.8688MHz- atsukita
- Post #56
- Forum: Portable Source Gear
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Poll: Who uses an iRiver H1x0 with digital out?
iHP I2S OUT MOD I succeed I2S out mod of my iHP-120. I2S signal from UDA1380 Philips Stereo audio coder-decoder. http://www.nxp.com/documents/data_sheet/UDA1380.pdf Pin10: Bit clock Pin11: Word clock Pin12: Data ( and ground from GND) I use...- atsukita
- Post #54
- Forum: Portable Source Gear
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Twisted Pear Audio Opus DAC
Quote: My Volumite wiring. OPUS controller terminal Volumite terminal G GND SDIN SDA SCK SCL...- atsukita
- Post #960
- Forum: DIY (Do-It-Yourself) Discussions
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Twisted Pear Audio Opus DAC
Quote: Roughly 6 - 7 hours with 1000mAh Li-Po battery. I am using (external) Li-Po battery charger. (for Radio-Controlled Car) To add battery charging circuit, LTC4070 seems good and easy...- atsukita
- Post #952
- Forum: DIY (Do-It-Yourself) Discussions
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Twisted Pear Audio Opus DAC
My OPUS DAC portable- atsukita
- Post #950
- Forum: DIY (Do-It-Yourself) Discussions
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MST Audio's Cio mb DAC with dual DAC chips
Thank you very much for your kind support, ryuzoh. I am very happy with this metal S/PDIF mod especially for cable compatibility (and of course better sound quality) And congratulations for your company launch and Fi.Q / MB pre-order starting! I hope you and your colleagues will have...- atsukita
- Post #12
- Forum: Portable Headphone Amps
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Poll: Who uses an iRiver H1x0 with digital out?
iHP metal S/PDIF mod I succeeded to get metal S/PDIF out with iriver iHP-120 ,140. (same as coax mod but I don't use coax jack and cable...) Use iHP's line-in mini-jack for S/PDIF metal out for easy modification. S/PDIF out signal is "R" with this wiring. I cut pattern...- atsukita
- Post #30
- Forum: Portable Source Gear
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MST Audio's Cio mb DAC with dual DAC chips
Quote: mini BNC with coax cable sounds good idea I chose easy way "mini stereo - mini stereo" because of cable compatibility.- atsukita
- Post #8
- Forum: Portable Headphone Amps
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MST Audio's Cio mb DAC with dual DAC chips
Cio MB - Coax Mod I add coax-in port for my coax mod iHP. This DAC has 2 blank solder pad for S/PDIF input. Easy to add coax port. CS8416 receiver has RXP0 - 7 = 8 AES3/SPDIF Input and RXP 0, 2, 3 is available with this DAC. ( RXP 2 is occupied for optical TOSLINK)...- atsukita
- Post #5
- Forum: Portable Headphone Amps
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The RSA Protector balanced portable: Images and impressions 1st page, Please post your impressions . .
Balance connector of the protector is Japanese standardized JEITA RC-5204.- atsukita
- Post #591
- Forum: Portable Headphone Amps
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The RSA Protector balanced portable: Images and impressions 1st page, Please post your impressions . .
Fortunately, I had chance to try this Hirose connector and compare to Kobiconn one. Hirose's connector is really nice, Small, High quality, Good stiffness, Precise and Easy. (Secure feeling with Latch function) Especially this Hirose type connector is easy to buy cable connected Jack, easy...- atsukita
- Post #578
- Forum: Portable Headphone Amps
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Kits for a portable amp.
You can use shorter shaft too. Knob shaft is not direct go through to rotary switch. Each module (knob shaft, resister part, rotary switch) has own shaft and conected by shaft projection and hollows. Source: ALPS direct Minimum lot q'ty is 5pcs in Japan.- atsukita
- Post #35
- Forum: DIY (Do-It-Yourself) Discussions
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Kits for a portable amp.
To get Alps dual 100k ohm with rotary switch, I use 2 pot for this kit and modified. RK097122100Y 50ohm/dual/3B/rotary switch (normal stock) RK097121009J 100ohm/dual/15A/no switch (normal stock) 1. Grind pins 2. change resister part 3. re-assemble- atsukita
- Post #31
- Forum: DIY (Do-It-Yourself) Discussions