crackle | Crack and decrypt BLE encryption
kandi X-RAY | crackle Summary
kandi X-RAY | crackle Summary
crackle cracks BLE Encryption (AKA Bluetooth Smart). crackle exploits a flaw in the BLE pairing process that allows an attacker to guess or very quickly brute force the TK (Temporary Key). With the TK and other data collected from the pairing process, the STK (Short Term Key) and later the LTK (Long Term Key) can be collected. With the STK and LTK, all communications between the master and the slave can be decrypted. Before attempting to use crackle, review the [FAQ] FAQ.md) to determine whether it is the appropriate tool to use in your situation. crackle was written by Mike Ryan See web site for more info: ![Build Status] "Build Status").
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QUESTION
I'm trying to create a sound using Fourier coefficients.
First of all please let me show how I got Fourier coefficients.
(1) I took a snapshot of a waveform from a microphone sound.
- Getting microphone: getUserMedia()
- Getting microphone sound: MediaStreamAudioSourceNode
- Getting waveform data: AnalyserNode.getByteTimeDomainData()
The data looks like the below: (I stringified Uint8Array, which is the return value of getByteTimeDomainData()
, and added length
property in order to change this object to Array later)
ANSWER
Answered 2022-Feb-04 at 23:39In golang I have taken an array ARR1 which represents a time series ( could be audio or in my case an image ) where each element of this time domain array is a floating point value which represents the height of the raw audio curve as it wobbles ... I then fed this floating point array into a FFT call which returned a new array ARR2 by definition in the frequency domain where each element of this array is a single complex number where both the real and the imaginary parts are floating points ... when I then fed this array into an inverse FFT call ( IFFT ) it gave back a floating point array ARR3 in the time domain ... to a first approximation ARR3 matched ARR1 ... needless to say if I then took ARR3 and fed it into a FFT call its output ARR4 would match ARR2 ... essentially you have this time_domain_array --> FFT call -> frequency_domain_array --> InverseFFT call -> time_domain_array ... rinse N repeat
I know Web Audio API has a FFT call ... do not know whether it has an IFFT api call however if no IFFT ( inverse FFT ) you can write your own such function here is how ... iterate across ARR2 and for each element calculate the magnitude of this frequency ( each element of ARR2 represents one frequency and in the literature you will see ARR2 referred to as the frequency bins which simply means each element of the array holds one complex number and as you iterate across the array each successive element represents a distinct frequency starting from element 0 to store frequency 0 and each subsequent array element will represent a frequency defined by adding incr_freq
to the frequency of the prior array element )
Each index of ARR2 represents a frequency where element 0 is the DC bias which is the zero offset bias of your input ARR1 curve if its centered about the zero crossing point this value is zero normally element 0 can be ignored ... the difference in frequency between each element of ARR2 is a constant frequency increment which can be calculated using
QUESTION
I've came across a problem where I'm trying to make a side bar in WPF. I've made the grid area for it and it seems to exist however when I try to put a label on it the label seems to be hidden behind the grid. I tried using z-index to no prevail however if I use a margin to move the text to the top of the form then it appears.
...ANSWER
Answered 2021-Nov-02 at 05:15For your second subgrid add this: Grid.Row = "1" Otherwise both grids are in the same row (0 based index applies here)
QUESTION
I have a non-player character in an Inform 7 Interactive Fiction story that I would like to get a simple reply from. The character is a robot doctor. When you get on the exam table the robot doctor holds out a tongue depressor and asks you to say, "Ah." I would like the character to say something when the player types, "say ah" but so far it's not working.
Here is my code thus far:
...ANSWER
Answered 2021-Nov-01 at 01:39After some more research, I have discovered that the responses understood by Inform are yes, no, and sorry. So understand "ah" and "say ah" as saying yes.
followed by Instead of saying yes in the presence of the Auto-Doc, say "Mmm. Mm-hmm. Very interesting."
is one way to do it.
Here's what the code looks like now:
QUESTION
I did a pure CSS/JS piano keyboard using the AudioContext
object but I have two problems related to the playTone
function:
On Chrome/android (
v.89.0.4389.105/Android 10
) it seems that the volume is halved at every key pressed: after a few notes played the volume is not audible anymore.On Firefox (
v.88/MacOS 10.15.7
) I hear a crackle at the end of every key pressed.
On latest Chrome/MacOS, for comparison, it sounds good.
...ANSWER
Answered 2021-Apr-26 at 10:01The problem with the volume in Chrome can be solved by using only one global AudioContext
which then needs to be resumed in the click handler.
The crackling in Firefox can be removed by adding an explicit value to the automation timeline to start with.
QUESTION
I'm tasked with creating a snap-crackle game from a function. I have a few issues. I'm able to get what I intended to get from steps 1 and 2, the last step, I'm suppose to create a prompt that will ask the user for a value that will be used in the function to deliver the result of the game . The final result I should have for example, if someone entered the number 12 at the prompt, it should print 12 for max value, and the string Snap, 2, Snap, 4, SnapCrackle, 6, Snap, 8, Snap, Crackle, Snap, 12.
However as you can see it's my code is causing some issues. It's showing multiple snap-crackle strings, it showing two max values, and one of them is null. I don't know how I can change maxValue variable to now be the highestNumber variable that is asked in the prompt. There's no way to tie that highestNumber value back into the function as maxValue, and it seems the code is reading two different games instead of only one. I'll will post the instructions and my code so far, to make things understandable and apologies for the long post, trying best ti explain what is suppose to be going on here.
...Step One
Write a function named snapCrackle that takes one parameter: maxValue. This function should loop through 1 up to maxValue (inclusive) and build a string with the following conditions:
- If a number is odd, concatenate "Snap, " to the end of the string.
- If a number is a multiple of 5, concatenate "Crackle, " to the end of the string.
- If a number is both odd and a multiple of 5 concatenate "SnapCrackle, " to the end of the string.
- If a number is neither odd or a multiple of 5, concatenate the number and ", " to the end of the string.
Step Two
Write a function called render that takes in two parameters: text, and maxValue. This function should print the game to the page using document.write().Step Three
Finally, create a prompt that asks the user for the max value. Assign the result of the prompt to a variable, highestNumber Then call snapCrackle(highestNumber) and assign the result to a variable, result. Finally, call render(result, highestNumber); This will render your game to the page
ANSWER
Answered 2021-Apr-15 at 17:31This seems like a homework assignment so I'm only going to point out the things that are wrong in terms of how you're using the function. I'm not 100% sure if the logic inside your function is correct or not, hopefully you can figure that part out on your own.
Your function snapCrackle
doesn't take an argument so it's always using the maxValue
declared on line 1 and never using the value you put into the prompt.
You're also running the function twice which both calls are referencing the same array (declared on line 2). So regardless of what you enter into the prompt it just runs the function as if maxValue
is 12 and it runs it twice.
You can fix this by removing your declarations on lines 1 and 2. And then modifying your function to look like this:
QUESTION
The assignment is to create our own snap-crackle game from a function.
I believe I did step one of this correctly, now I'm on step two, and it's printing what I want it to print, but the string has double commas, between the elements.
Could someone assists me and point me in the right direction with this?
I'm not exactly sure what did I'm doing wrong in this case.
For background purposes, I will share the instructions and my code so far. Thank you to anyone for the help.
Step One
Write a function named snapCrackle that takes one parameter: maxValue. This function should loop through 1 up to maxValue (inclusive) and build a string with the following conditions:
If a number is odd, concatenate "Snap, " to the end of the string.
If a number is a multiple of 5, concatenate "Crackle, " to the end of the string.
If a number is both odd and a multiple of 5 concatenate "SnapCrackle, " to the end of the string.
If a number is neither odd nor a multiple of 5, concatenate the number and ", " to the end of the string.
ANSWER
Answered 2021-Apr-15 at 13:42You included commas in the strings you created, which you didn't need to do. You can just remove the commas from the strings. Javascript automatically includes commas when printing arrays.
QUESTION
Hi Im trying to build a scraper (in Python) for the website ReelGood.com.
now I got this topic to and I figured out how to scrape the url from the movie page. but what I can't seem t figure out why this script won't work:
...ANSWER
Answered 2021-Mar-23 at 17:38I would use a combination of attribute = value selectors to target the elements which have the full url in the content attribute
QUESTION
I am doing this assignment:
Write a function named snapCrackle that takes one parameter: maxValue. This function should loop through 1 up to maxValue (inclusive) and build a string with the following conditions: If a number is odd, concatenate "Snap, " to the end of the string. If a number is a multiple of 5, concatenate "Crackle, " to the end of the string. If a number is both odd and a multiple of 5 concatenate "SnapCrackle, " to the end of the string. If a number is neither odd or a multiple of 5, concatenate the number and ", " to the end of the string. This function should console.log() the final string after maxValue iterations of the loop.
This is my solution:
...ANSWER
Answered 2020-Aug-23 at 04:14You have done all the hard-work. Small changes and you are good with your answer.
QUESTION
I have last problem with my code. Code sending via POST variables from Outlook to API.
My last problem is how to send variables and mail attachment in one POST request to API.
first 7zip comprimation for mail attachement:
...ANSWER
Answered 2020-Jun-03 at 05:37Upload
is a standalone method, so you should be able to call it something like this:
QUESTION
I am trying to learn some Core Audio and to start with I've tried to make a basic audio unit that just generates a sine wave with an adjustable frequency. The problem I have now is that I have severe crackle and pops whenever I adjust the frequency and I am not sure where to look to find the cause of this.
I can't even tell if it's just because I need to do some smoothing when moving between frequencies, although I haven't seen that in any examples so far.
Anyway, here's the implementation of my audio unit:
...ANSWER
Answered 2020-Feb-11 at 18:44This is a typical bug caused by incrementing time and calculating a new phase (for the sine function parameter) every loop iteration, which produces phase discontinuities when changing frequencies.
One simple solution is to increment phase instead of time. It's easy to compute the phase delta per unit time for a given frequency, and do that computation outside the inner loop. Since this phase delta is small, there will be no big phase discontinuities to produce crackles and pops.
Calculating a new phase this way each iteration only requires addition, not multiplication (by 2.0 * M_PI, etc.).
You might also want to bound the range of the phase inside +- M_PI or +-2pi, instead of letting it grow arbitrarily large, which can cause range reduction errors inside the sine function.
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