midi | Receive , transmit and manipulate browser MIDI events | Audio Utils library

I am trying use a feature policy, serial, in my google add-on. I am having difficulty trying to enable this particular feature policy inside an iframe, mainly I believe is because the parent iframes don't have it enabled. Below is what the iframe DOM tree looks like. I don't have access to "sandboxFrame" and "userHtmlFrame" directly, so I cannot change its allowed features. Even if I set 'serial' in the most child iframe, I cannot find the 'serial' feature enabled in its featurePolicy.

I'm trying to work with an old version of DirectX (8.1) and I'm finding the documentation more than a little confusing. It feels like the IDirectMusicPerformance8 interface is for MIDI playback, as it has various MIDI-related methods on it, but various parts of the documentation suggest that it can be used to play back WAV data as well. For instance, the tutorial says that you call InitAudio on the performance, and it states "Wave files require only a single performance channel, and MIDI files require up to 16".

So is it for MIDI or can it be used for WAV?

If it can be used for WAV, I'm even more stumped, because I'm initializing it, running performance->PlaySegment(segment, 0, 0, NULL), getting a success response, but the audio is silent.

I finished a project in R markdown and all I have to do is knit it as a word document, but there's this message error that I can't understand where I have made the mistake.

Error in yaml::yaml.load(..., eval.expr = TRUE) : Scanner error: mapping values are not allowed in this context at line 4, column 22 Calls: ... parse_yaml_front_matter -> yaml_load -> Execution halted

I looked at line 4 and it's just the date of the project and line 22 is an empty line so they're not the issue. Can anyone translate what the error means? Is it one of the chunk codes or any other error? Please and thank you These are the first 22 lines of the code(the language used is my country's language, just information):

The iframe with allow="geolocation" works great. But what if I want to load a link which calls getCurrentPosition() from a html anchor tag?

Example : In iframe, I'll use

I have a use case where a html embed link like

Click here to get geolocation

is embedded in a parent site. The parent site loads the child link inside it's own iframe

It is to be noted that The parent site's iframe has the allow="geolocation" attribute .

In this case the request is silently denied with error

errorCode :1

errorMessage: "Geolocation has been disabled in this document by permissions policy."

The feature policy document point to iframe but what about anchor tag embeds?

I understand that I can use a iframe instead of anchor tag embed but the parent site only allows anchor tag's.

PS - This is my first question here. Please assist.

Note :

1. I also tried a random shot by including allow="geolocation" for anchor tag, but it doesn't work.
2. This seems to work on Safari (which I'm assuming is because Safari hasn't yet implemented feature policy for cross origin site requests)

Edit 1 :

I tried my use case in jsfiddle and notice that all scripts i give (iframe or anchor tag) are loaded inside jsfiddle's iframe

If i load my iframe inside this, it works perfectly !(perfectly balanced, as all things should be...)

But if I load my anchor tag inside this, i get the error. As per granty's answer

the jsfiddle's iframe with allow='geolocation' should set jsfiddle site's feature policy that all scripts loaded inside that iframe can access geolocation right ? Why does my iframe inside jsfiddle's iframe work but anchor tag doesnt ?

Note - I have no control over the top level site. I only code the scripts for https://siteWhichCallsGetGeolocation.com

SOLUTION (if you have control over top document's feature policy or control over any intermediate </code> which have geolocation permission)</strong> (derived from granty's answer)</p> <p>I tried the suggested solution by changing the jsfiddle's iframe attribute via inspect element to</p> <p><code><iframe name="result" allow="midi; geolocation https://siteWhichCallsGetGeolocation.com ; microphone; camera; display-capture; encrypted-media;" sandbox="allow-modals allow-forms allow-scripts allow-same-origin allow-popups allow-top-navigation-by-user-activation allow-downloads" allowfullscreen="" allowpaymentrequest="" frameborder="0">

I recently redesigned my website and this is my first experience using the header and footer elements. On some pages, the footer will cover elements. What are some decent solutions for this? Example at the bottom of the midi page

Footer HTML code:

I am learning C programming from "Learn c the hard way by Zed Shaw". He asks the learner to try and break their own code.

So I tried the following C code and thought printing more values that I gave argv will break it but it did not until later.

I have separated the code into files (*.c and *.h) and included them. I have guard headers and all the separated files were reported to being build:

Getting following error from the console window after updating the chrome to version 88.0.4324.104

I have an excel spreadsheet used for tracking projects and need to add some functionality for different types of projects and timeline constraints. Below is an example of the 2 conditions I need to meet. Received- When project is received on site.

Construction completion- this is one type of project that requires 3-4 weeks to complete. this date will usually be entered manually, but may be set to start automatically at 4 weeks after Received date. If if does not require construction it is set to n.a.

Midi Expected- This is where I need a statement that reads if there is a date in "Construction Completion" add 7, if there is not then use the date in received and add 7.

QC Completion- This is simply Midi Expected + 7