yzhou

9 ms·

1.
by yzhou 9y ago
minimum 5.5mm^2 is required, so we are talking about 3575 euros here. Besides, it is very rare that you can get a production grade chip on the first try, bug happens all the time, you might need 2 or 3 or even more tries to get a working pr
2.
by yzhou 9y ago
why do you say Scott Adams is purely evil?
3.
by yzhou 9y ago
the devil is in the DAC and ADC. You just can't turn 16bit/24bit data directly to/from analog without much loss. The 1/65536 accuracy voltage divider simply don't exist. So, you have to up-sample the songs to high r
4.
by yzhou 11y ago
The low-passing with a brick wall filter on 44.1KHz audio can be a bad thing sometimes, for example, pre-echo https://en.wikipedia.org/wiki/Pre-echo You won't hear the pre-echo on a 2.8MHz DSD audio.
5.
by yzhou 11y ago
the probe is placed on the headphone jack. The difference in the vertical scaling is that 0dB DSD signal is 6dB below a 0dB PCM.
6.
by yzhou 11y ago
In the real world, it is almost impossible to make a voltage divider with 24bit resolution. So all the DAC makers have to convert 24bit audio into lower bits(6bits to 1bits), this step requires oversampling the original audio. It is a lot e
7.
by yzhou 11y ago
The brick wall filters used on low sample rate sound cause ringing in the time domain, which can "blur" the neighboring impulse.
8.
by yzhou 11y ago
There's a big difference in impulse response with different sample rates, any one can see it on a oscilloscope, I bet some one can hear the difference. Those who don't have a oscilloscope can see the picture here: http:/&#x2
9.
by yzhou 12y ago
many older people like my dad, don't know pinyin well. he doesn't input texts, but he browses web sites. He uses a default home pages full of links to start exploring the web.
10.
by yzhou 12y ago
the point of using number in the domain is, a lot of Chinese people don't know letters, they don't know English words and they can't get "PinYin"(using letters to represent Chinese words) right. How do you make thes
11.
by yzhou 12y ago
Here's what I want: A cheap text ssh terminal with wifi,or cellular, nice keyboard hardware, with extremely long battery life (or solar powered), which i can just throw it in my car and forget it. Whenever I am away of my computer I ca
12.
by yzhou 13y ago
SEEKING WORK Remote (SF Bay area) Speciality: C/C++>20years experience , Python, PHP, javascript, digital/analog circuit design, embedded programming, FPGA Contact: jerryzy@gmail.com
13.
by yzhou 14y ago
I've been using taobao intensively for our business for quite a long time. we are a hardware start-up, we bought components from taobao, make, assemble PCB prototypes from taobao, It's so much better than ebay, for example, they have a IM c
14.
by yzhou 14y ago
we have made a A3P250 FPGA board, with build-in USB interface, total cost of building the board is less than $50, can do a ton of things MCU can not do. would anyone want it if we commercialize it? http://cdn.shopify.com/s/files/1/0117/148
15.
by yzhou 14y ago
This kind of work is OK for some simple block level circuit designs. In the real world designs, as circuits grow complicated, and parasitics add in, the SPICE convergence issue kicks in and automation becomes difficult.
16.
by yzhou 14y ago
Just another reason for not hiring people based on their grades.
17.
by yzhou 14y ago
From a EE's point of view, what the OP said is that there's too much noise involved in multi-armed bandit algorithm. If that's the case, a low pass loop filter is needed. It's kind of like locking a PLL to a reference clock right?
18.
by yzhou 14y ago
I think your idea is awesome! I always believe in those "step removing" ideas.
19.
by yzhou 15y ago
high dynamic range is not about the lowest volume you can hear, it's about the voltage resolution between this sampling point and the next. Base on your assumption, we can all see black whether we use 16bit RGB color or 24bit RGB color, wha
20.
by yzhou 15y ago
The hearing of ears is a time-domain thing, not a frequency domain thing. It's the frequency response of all the frequency components added together. people might not be able to respond well to a single high frequency tone, but might respon
21.
by yzhou 15y ago
why do you think "This difference gets lost in the THD already at the DAC "? Do you have numbers to back it up? What's the noise floor of DAC? What's the noise floor of an output stage? Do you have the number?
22.
by yzhou 15y ago
A person can not hear a 22kHz tone doesn't mean he can not hear a sound that contains 22kHz components. For example, a square wave contains lots of high frequency harmonics, the more higher frequency harmonics it have, the "squarer" the squ
23.
by yzhou 15y ago
I guess what he meant was signal to noise ratio, i mean, Aplayer/Cplayer ratio. Too many Cplayer programmer start learning c++ without any idea how cpu and memory works, if you let them to mess with the kernels it would be a nightmare for