Bus Simulator Pc
Clotilde Moralas
Before Catalina when you dragged a file on the simulator the respective app was opened, the file was copied to the Inbox folder and the UIApplicationDelegate method application(_:open:options:) was called.
This worked for me. I just got this "Catalina" Permission Alert, to allow the Simulator access to my Documents folder. So I guess that's where the Problem is? I think I never got asked about Desktop/Downloads, so maybe Catalina just prevents the Simulator from accessing those locations.
When I tried this with a simulator running iOS 15.0, I could not drag from my Downloads folder onto the Simulator Files app. That failed with "you don't have permission"When I moved the file to my Documents folder, I was able to drag it into the Files app.
Just for anyone who cares, the reason for the stuffy audio is that Xcode starts a phone call, and I suppose my headphones don't like to output clean sound with the mic taking inputs.I know that Xcode is starting a call because my headphones have bluetooth multipoint, as well as giving me verbal feedback about whats going on with them.When bluetooth multipoint is active my audio will switch cleanly between my iMac and Ipad pro, unless one of them is taking a phone call then the phone call will get priority.When I get this muffled audio, my headphones won't switch to my Ipad to play audio, which suggests that a phone call is in progress.What really says that a call is in progress, is that when I change the input source in system preferences away from my headphones, the audio clears up but my headphones also say "call ended".All this means that Xcode must be starting a phone call for some reason, and my headphones don't like that.
Why my iMac speakers are happy to play music while "taking a phone call" but my headphones aren't may mean that it isn't a macOS issue but a limitation with the headphones, but this is just guess work.
As Ij000 mentioned, it's a Bluetooth limitation (turning on the mic channel leaves less bandwidth for music), but its worth noting it happens with AirPods too just to preempt any 'it must be your headphones' excuse.
I am having this issue almost all the time. Use case: Running XCode with a simulator and listening to Spotify. Always when you rerun the project or enable the "Debug view hierarchy" you hear annoying crackle and distortions in the music being played. I guess the reason can be also in my in-app muted videos, but it is still a bug from XCode.Now playing the music from the iPad :(
I have the same issue - the same MacBook Pro (2019) Intel i9 processor as the original post. I didn't notice it was caused by the simulator but it makes sense as I use the simulator for work all the time.
It's been more than 3 years (Intel + M1 machines) since I am experiencing this issue and it's very annoying that we don't have a proper solution for it.Every time the simulator gets launched audio crackling starts.
The XCode simulator generates sounds (anything from Picker wheel clicking to audio/haptic generated by the App) and every time it generates a sound it pauses any Bluetooth device I have connected for a second or two. When it starts again, the audio is distorted and audio level is changed. This is really annoying.From reading the replies above, I directed the system audio to the Mac Studio speakers and that solved the problem, but now I'm not getting the alerts as I'm on headphones.The solution is for Apple to overlay the two audio channels seamlessly without stopping/starting any audio.
While I understand what simulation and emulation mean in general, I almost always get confused about them. Assume that I create a piece of software that mimics existing hardware/software, what should I call it? A simulator or an emulator?
Emulation is the process of mimicking the outwardly observable behavior to match an existing target. The internal state of the emulation mechanism does not have to accurately reflect the internal state of the target which it is emulating.
Ideally, you should be able to look into the simulation and observe properties that you would also see if you looked into the original target. In practice, there may some shortcuts to the simulation for performance reasons -- that is, some internal aspects of the simulation may actually be an emulation.
EDIT: Other responses have pointed out that the goal of an emulation is to able to substitute for the object it is emulating. That's an important point. A simulation's focus is more on the modeling of the internal state of the target -- and the simulation does not necessarily lead to emulation. In particular, a simulation may run far slower than real-time. SPICE, for example, cannot substitute for an actual electronics circuit (even if assuming there was some kind of magical device that perfectly interfaces electrical circuits to a SPICE simulation.)A simulation does not always lead to emulation --
Simulator mimics the activity of something that it is simulating. It "appears"(a lot can go with this "appears", depending on the context) to be the same as the thing being simulated. For example the flight simulator "appears" to be a real flight to the user, although it does not transport you from one place to another.
Emulator, on the other hand, actually "does" what the thing being emulated does, and in doing so it too "appears to be doing the same thing". An emulator may use different set of protocols for mimicking the thing being emulated, but the result/outcome is always the same as the original object. For example, EMU8086 emulates the 8086 microprocessor on your computer, which obviously is not running on 8086 (= different protocols), but the output it gives is what a real 8086 would give.
It's a difference in focus. Emulators1 focus on recreating the behavior of a system, with no regard for how the system functions internally. Simulators2 focus on modeling the components of a system. You use an emulator when you care mostly about what a system does, and a simulator when you care about how it does it.
As for their general English meanings, emulation is "the endeavor to equal or to excel another in qualities or actions", while simulation is "to model, replicate, duplicate the behavior, appearance or properties of". Not much difference. Emulation comes from mulus, "striving, rivaling," and is related to "imitate" and "image," which suggests a surface-lever resemblance. "Simulation" comes from similis "like", as does the word "similar," which perhaps suggests a deeper congruence.
In short: an emulator is designed to copy some features of the orginial and can even replace it in the real environment. A simulator is not desgined to copy the features of the original, but only to appear similar to the original to human beings. Without the features of the orginal, the simulator cannot replace it in the real environment.
An emulator is a device that mimics something close enough so that it can be substituted to the real thing. E.g you want a circuit to work like a ROM (read only memory) circuit, but also wants to adjust the content until it is what you want. You'll use a ROM emulator, a black box (likely to be CPU-based) with a physical and electrical interfaces compatible with the ROM you want to emulate. The emulator will be plugged into the device in place of the real ROM. The motherboard will not see any difference when working, but you will be able to change the emulated-ROM content easily. Said otherwise the emulator will act exactly as the actual thing in its motherboard context (maybe a little bit slower due to actual internal model) but there will be additional functions (like re-writing) visible only to the designer, out of the motherboard context. So emulator definition would be: something that mimic the original, has all of its functional features, can actually replace it to some extend in the real world, and may have additional features not visible in the normal context.
A simulator is used in another thinking context, e.g a plane simulator, a car simulator, etc. The simulation will take care only of some aspect of the actual thing, usually those related to how a human being will perceive and control it. The simulator will not perform the functions of the real stuff, and cannot be sustituted to it. The plane simulator will not fly or carry someone, it's not its purpose at all. The simulator is not intended to work, but to appear to the pilot somehow like the actual thing for purposes other than its normal ones, e.g. to allow ground training (including in unusual situations like all-engine failure). So simulator definition would be: something that can appear to human, to some extend, like the original, but cannot replace it for actual use. In addition the pilot will know that the simulator is a simulator.
I don't think we'll see any ROM simulator, because ROM are not interacting with human beings, nor we'll see any plane emulator, because planes cannot have a replacement performing the same functions in the real world.
In my view the model inside an emulator or a simulator can be anything, and has not to be similar to the model of the original. A ROM emulator model will likely be software instead of hardware, MS Flight Simulator cannot be more software than it is.
This comparison of both terms will contradict the currently selected answer (from Toybuilder) which puts the difference on the internal model, while my suggestion is that the difference is whether the fake can or cannot be used to perform the actual function in the actual world (to some accepted extend, indeed).
Note that the plane simulator will have also to simulate the earth, the sun, the wind, etc, which are not part of the plane, so a plane simulator will have to mimic some aspects of the plane, as well as the environment of the plane because it is not used in this actual environment, but in a training room.
This is a big difference with the emulator which emulates only the orginal, and its purpose is to be used in the environment of the original with no need to emulate it. Back to the plane context... what could be a plane emulator? Maybe a train that will connect two airports -- actually two plane steps -- carrying passengers, with stewardesses onboard, with car interior looking like an actual plane cabin, and with captain saying "ladies and gentlemen our altitude is currenlty 10 kms and the temperature at our destination is 24C". Its benefit is difficult to see, hum...
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