Recent content by MindsMirror
  1. MindsMirror

    MP3-File is ok on PC but distorts on Smartphone or DAP

    "Clipping Yes" means that if the player decodes and sends the data to the DAC without reducing the volume first, there will be digital clipping in the signal. But if the player decodes the data to floating point and adjusts the volume before converting to fixed point data needed for the DAC, it...
  2. MindsMirror

    MP3-File is ok on PC but distorts on Smartphone or DAP

    Try analyzing the file with MP3Gain or replaygain to see what the peak level is. Due to the way MP3s are encoded, it's possible for the decoded data to exceed the full scale level which may cause clipping depending on how the decoding and playback is handled. You can use MP3Gain to reduce the...
  3. MindsMirror

    Understanding output power

    3.4 Vrms is not a measure of power. You can use the equation of Ohm's law to convert between voltage, power, resistance, and current, but you need to have at least two of those numbers and the spec sheet I saw didn't have that. So you can't directly compare the two with just the info they put in...
  4. MindsMirror

    Help with DIY attenuator for Modi/Vali stack

    I would make it an L which is just a simple voltage divider. You don't really need to worry about transmission line effects or impedance matching in audio signals which are relatively low frequency. Just make sure the value of the resistor network is greater than the source and less than the...
  5. MindsMirror

    What's the reason for this headphone clipping? (video)

    It looks like you may be causing clipping in the digital signal with your volume and EQ settings. You have some EQ bands which are set at maximum, it is likely that this could cause clipping. Rather than boosting certain EQ bands it is generally better to reduce the other bands instead. You have...
  6. MindsMirror

    Sound Quieter with Amp than without.

    There's nothing wrong with the amp. Turn the volume up and/or switch to high gain if you need it to be louder.
  7. MindsMirror

    Does the AMP work properly without a DAC?

    This is nothing unusual. The Magni 3 in the low gain setting has a gain of 3dB. That means at max volume it amplifies the input signal by 3dB, which won't sound much louder. Just use high gain if low gain doesn't get loud enough. The high gain setting has 17dB of gain.
  8. MindsMirror

    Is this a good FR for a Audeze LCD 2 Fazor?

    I think it's not meant to show differences between each unit, it's just showing you that they tested it. If they tested it and the FR was different than expected, they wouldn't have shipped that unit. They include the chart to show they have verified that it met their QC criteria.
  9. MindsMirror

    Why Asus Xonar STU Internal 5 Pin Header not jumpered?

    Given its proximity to U2 and U22 (a microcontroller and a CMOS logic chip), I'd say it's probably a serial port for programming, testing, or debugging during design or assembly. Put an oscilloscope on it if you want to see what it does.
  10. MindsMirror

    Is it possible to connect multiple amplifiers to a single DAC?

    There's no drop in volume when using y-splitters from a DAC to multiple amps. You can verify this by listening to one amp while disconnecting another from the splitter.
  11. MindsMirror

    Is it possible to connect multiple amplifiers to a single DAC?

    You'd need two sets, so 4 mono Y-splitters if your source is stereo RCA. There's nothing to be afraid of as far as audio quality, but if it gives you peace of mind or you prefer the functionality then a fancy switch box would work too. But it would make so little difference to the audio quality...
  12. MindsMirror

    Is it possible to connect multiple amplifiers to a single DAC?

    All you need is 2 y-splitters. No need for a switch box, just turn on only the amp you're going to use.
  13. MindsMirror

    AMB Delta1 Input Impedance Calculation

    From the AMB website regarding the Gamma2: I'd guess low output impedance means a few Ohms to tens of Ohms at most. It should have no trouble driving 25K.
  14. MindsMirror

    Best noise canceling headphones.

    You'll probably have to spend more to get better noise canceling unfortunately. I expect construction noise is tough for ANC headphones to deal with, they're better at canceling consistent noises like rumble and white noise. Personally I've compared the QC35 II vs the Sony WH1000XM3 and bought...
  15. MindsMirror

    Sound card: using both headphone jack AND optical-out-to-DAC for two-person listening - Seems to work! But how? And any downsides?

    If you plug into most of the other ports, windows will switch the payback device from your SBZ to that other device. It works with the SBZ because it has the "send stereo mix to S/PDIF" option, so when it is the payback device for the headphones, it can also output to the optical. If you connect...
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