Chronotron supports playlists since Release 43. The playlist functionality is accessible through the Playlist pane, which you can open by selecting Playlist out of the hamburger menu.

In this post I’ll go through the ins and outs of playlists in Chronotron.

Creating Playlists

There are multiple ways to create playlists in Chronotron. You can either:

• Select multiple files during Open (Ctrl + O). By the way, the complete list of keyboard shortcuts can be found here.
• While the Playlist pane is visible, click Add (Ctrl + Shift + O) to select the files to be added to the current playlist.
• Drop media files from Windows Explorer into the Playlist pane.
• If you made Chronotron your default app for media files in Windows, then opening multiple files directly from Windows Explorer will launch the app and create a new playlist with those files.
• From the Recent or Library dropdowns, clicking the “+” button – depicted below – will add the media to the current playlist. If, by accident, you missed to hit the “+” button, the Revert button will come in handy.

You can save the playlist for later use once you’re happy with it. Just click Save (Ctrl + S) and select the location where you want the new playlist to be stored. If you saved the Playlist at any location under your Music or Video libraries, then the app will also show your playlist under Playlists in the Library dropdown.

Playlist AutoSave is enabled by default, so you don’t have to care about saving the current playlist every time you modify it. You can disable AutoSave via the Options pane.

The New and Save As commands – shown below – allow you to start building a new playlist from scratch or saving the current playlist to a different .m3u file, respectively.

Playlists Created with Other Programs

Chronotron supports opening .m3u files created by Winamp, Windows Media Player or other programs.

Unlike most other programs, though, Chronotron stores the media parameters used for each file in the playlist, that is, tempo, key, speed, equalizer settings, volume, balance, channel selection, video flip and video delay. This allows you, for instance, to add the same song multiple times to the same playlist, each time at a different tempo or key.

A .m3u file is just a text file listing the locations of the files to be played in sequence. The screenshot below is an example of what a .m3u file looks like when opened in notepad.exe.

While that’s a simple – yet powerful – approach, it turns out that with great power comes great responsibility: a maliciously crafted playlist could induce the player to load harmful content by exploiting bugs, either in the app or in the OS, to compromise your system security.

To mitigate such threats, Microsoft Store apps are granted limited access to files stored in your PC. Apps are only allowed to load files resulting from an explicit user action, like the Open File dialog box or drag & drop into the app window, or files stored in certain locations, like the Audio and Video libraries (i.e. My Music and My Videos).

In the above example, you can see that the media files are stored under D:\Playlist Media. Because that location is currently not part of my Windows libraries, when I first tried to open this playlist with Chronotron, I got the following error message:

If the media files were stored under My Music, Chronotron would have played them just fine. However, the app is now complaining about the fact that it cannot access the location where these files are stored.

So, all I need to do is go to the Options pane and authorize Chronotron to access D:\Playlist Media – or even the whole D:\ drive, if I feel like I trust the app – and voilà: the playlist plays. The screenshot below shows the relevant section of the Options pane.

Alternatively, I could have made D:\Playlist Media part of My Music library, in which case the app would have been automatically authorized to access the files.

Other Common Playlists Tasks

You can reorder playlist items by dragging them around, either using touch or the mouse. Please note that, when using touch input, you need to tap and hold on the item to start dragging it.

Another way to move playlist items is by using the Up and Down buttons in the bottom toolbar. This toolbar also allows you to remove selected items and select all items in one go.

If your device sports a touchscreen, you can remove items without selecting them by swiping the item you want to remove to the left.

Conversely, if you hover the mouse over playlist items, you can enter selection mode by clicking the checkbox next to the item.

Wrap Up

I hope this post provides a good understanding of how playlists work in Chronotron. Don’t hesitate to post your comments here or contact me via the usual support channels if you have questions, comments or suggestions.

The G-clef is arguably the most recognizable musical symbol, also for non-musicians. Its familiar shape looks like a distorted ampersand symbol, though you might be surprised to learn that it actually emerged as an evolution of the letter G (well, I’d say it’s as close to the original as this portrait of Picasso, but historians know better than me).

The Chronotron logo, which represents the fusion of a G-clef and a clock – a “Clock-clef”, if you will –, took shape more than one decade ago. Credit where credit is due, it’s my wife who came up with the idea and first sketched it on paper. Later on, the Cuban designer Diego Monzón produced the first vector image of it, which is still at the heart of today’s app branding.

Since Chronotron became an app, the app logo consisted in the original Clock-clef enclosed in a guitar pick shape.

This layout conferred the app logo some volume and emphasized the suitability of the software for guitarists, but unfortunately it also turned the original logo into an afterthought. In fact, I bet most of you actually believed that the Chronotron logo was just a G-clef drawn on a guitar pick.

Because Chronotron today covers a wide range of use cases reaching far beyond its original audience, it’s time to update the app imagery accordingly. So, starting from Release 104, we have…

A New App Logo!

Indeed, the most noticeable change in Release 104 is the revamped logo, which is depicted below.

The Clock-clef symbol is now much more prominent than before and it sits on a blurred score, which reduces its verticalness and gives a sense of speed.

If you happen to use Chronotron as the default player for certain file types, you will also notice that the file icon now consists in the Clock-clef symbol on a dark blue background.

Other Changes in Release 104

The audio scroller is now visible by default, but you can still hide it via the Options pane. Waveforms are cached when a file is first loaded, so they load almost instantaneously the next time you open the same file.

A new release is always an opportunity to smash a few bugs. One of these bugs prevented the playlist from moving to the next track while the app is minimized or when the Windows session is locked. This issue was reported by a user – through an app review – and has been fixed in this release.

Honest feedback is much appreciated. Don’t hesitate to contact me via the corresponding app menu option, or by leaving a comment in this blog.

Ventriloquists can utter entire phrases while their lips remain still. Their second voice doesn’t appear to come from the usual parts of the body you would expect it to come from, yet it is there. So, when I first saw Jeff Dunham perform, I joked to my colleagues “This guy must have two soundcards”.

The two-soundcard metaphor is an amusing one. In reality, though, ventriloquists don’t have the ability to use their two voices at the same time, whereas some systems can play music over one soundcard while using a different device for monitoring.

You may be interested to know that Chronotron also allows you to select which playback device to use, provided that your PC has multiple soundcards. This comes in handy, for example, if you need to switch often between your headphones and your main boxes.

You could enable this behavior in previous versions of the app by turning on the option Use alternative playback engine. The good news is that, starting from Release 103, the new playback engine is now the default one so device switching is readily accessible. No additional tweaking needed.

Click on the speaker button at the left of the transport controls, as shown above, then select the device you want to use out of the popup menu. And that’s basically all there’s to it.

Just like ventriloquists do, the app can switch from one soundcard to another, even during playback (as of this writing, only one device can be active at the time).

Does your system have multiple soundcards? Are there other scenarios you would like to see implemented in Chronotron? Let me know via the Comments section or through the usual support channels.

When I use Chronotron to practice guitar licks, I find it cumbersome to operate the app while having my two hands lying on the instrument. For us guitarists dropping the pick to hit a button isn’t a big deal after all, but things get really bad when you’re playing violin or cello.

There are different ways to address this challenge. For example, the app could support footswitches (though guitarist already have too many of them) or implement a delayed playback command so you have time to get ready before the music begins.

I decided to go for a different solution, though: voice commands. Assistive technology has been around for quite some time and works really well, so why not controlling Chronotron with your voice? This is what Release 102 is about.

Configuration

Chronotron understands English, French and Spanish. The app will try to use the recognition language selected in your Windows’ Speech settings, which may or may not be your Windows display language, as shown below.

If the selected language isn’t supported by the app, then the app display language will be used, provided that the corresponding voice recognition Windows package is installed. You can add voice recognition languages to Windows through the Region & Language settings.

Hardware Setup

A rehearsal room is usually a noisy environment. I recommend wearing a headset mic so the computer doesn’t get confused by the sounds coming out of your instrument. In my own setup, though, I can talk directly though my laptop’s mic without any issues because – to my neighbors’ delight – my guitar rig is routed through my headphones.

Windows has a wizard that allows you to fine-tune voice recognition to best match your hardware configuration. Running that wizard isn’t compulsory, but it does improve recognition accuracy.

Talking to the App

By default, Chronotron won’t listen for commands. To talk to the app, press the Voice Commands button located inside the small command bar at the top left corner of the window.

You can use your voice to start and stop playback, play slower or faster and work with loops and markers, which are the things you will most likely want to do without touching the PC.

The complete list of supported commands, including their translation into all app languages, can be found in here. The command “what can I say?” – or its equivalent in the selected language – opens the documentation in your web browser.

Here is what the list looks like as of this writing:

Raise Your Voice

Does it work for you? Are there any other app commands that you would like to control with your voice? Let me know via the usual channels or by posting a comment.

A friend of mine asked me recently why Chronotron is a Windows-only app.

This is not an infrequently – nor unfrequently – asked question. Chronotron is a media player app whose design language is clearly touch-oriented. Music apps have been the realm of Macs for as long as I can remember, and today most touch-enabled apps run on Android or iOS. So why Windows?

The answer has of course a lot to do with the app history and the developer’s experience with that platform, but not only. The typical Windows desktop/laptop/tablet hardware configuration is capable of doing pretty serious number crunching, and that’s the kind of power needed to perform time-stretching in real time at DAW quality levels. And when it comes to user experience, Windows has a nice UI and supports a myriad of input methods, including touch.

However, my friend’s question is motivated by a growing concern out there: does Windows have a future in the consumer space?

Before going any further, let me tell you that I’m by no means an aspiring OS market analyst. This post is based only on my personal observations and experiences as an app developer.

A lot has been written elsewhere about Microsoft becoming the new IBM, so it seems that future Windows relevance to end users is indeed a subject. There’s certainly more to it than tech news clickbait: I keep hearing stories from colleagues, friends and relatives about companies relegating Windows to the data center – or to the cloud – and running their few remaining desktop apps virtualized. I have noticed myself that some enterprise software, which used to rely on fat clients, have become browser-based in their newer releases and therefore less dependent on the client OS.

Some go as far as saying that “Windows is done” when it comes to end-user computing, though in my opinion this is largely exaggerated. However, there’s something that worries me a bit going forward as an app developer: user age demographics.

A picture is worth a thousand words.

The total number of samples over the selected period is a four-digit figure (niche app obliges), but I have seen election polls conducted with less samples than that. Also, we’re talking here about paid software which most would classify under Productivity Tools rather than under Time-Wasters. It has no “social features” and no “engagement notifications”, though it does support stuff like touch, the Surface Dial and – scoop, scoop! – soon speech.

Still, one could assume that the elders would be more likely to stay with a previous version of Windows – therefore not having access to Store apps – so younger age groups would get a boost in the stats, or in any case appear less dim. Such simplistic interpretation might be wrong. Actually, I hope I’m wrong.

But what about Microsoft’s vision and message? The push to get desktop apps to the Microsoft Store is a good move, though I doubt it will help rejuvenating the Windows user base. On the other hand, the Dev Center Benefits website – a rewards program for app developers – hasn’t been updated since almost one year ago. So yes, Microsoft could work harder on telling us developers what their vision for the consumer market is.

Time will tell if Windows will succeed as an app ecosystem. At the moment I have no plans to port Chronotron to other platforms because, as a Windows developer, I want to believe.

And I love you, dear user, the way you are.

 

[Edit 2018-03-12]

I’ll share some more data with you, at the risk of adding fuel to the fire that my original post started.

Below is the age demographics of Chronotron Mobile, a free version of Chronotron that ran on Windows Phone 8.1. The app lived from Nov 2014 to Nov 2016.

Now comes the interesting thing. Chronotron Mobile offered in-app purchases, and here’s the age demographics of the paying customers:

We all know purchasing power matters. However, the above chart is closer to what I expected from a platform having a reasonable share of younger users (Windows Phone 8.1 in this case).

A hundred years make a century, so goes the saying. What about a hundred app releases? A centu-re-lease.

Bad jokes aside, reaching the 100^th release of Chronotron is quite a milestone. It means the app package has been rebuilt, the release notes updated and the Microsoft Store review process completed at least as many times.

In this post I’ll show you what’s new and changed in Release 100. The first thing that you likely noticed – and probably the reason you’re here – is the prominent link to this blog on the app welcome page. As you can see, I’ve already written a couple of posts and shared some how-to videos. Scroll down through this page if you’re curious about what the app can do and don’t hesitate to leave comments if you have questions.

Video Adjustments

When it comes to app functionality, the most visible change is the new Video Adjustments pane.

The brightness, contrast and saturation controls are all new. The video flipping switches were already present in previous releases; however, a welcome improvement is that these controls now also work when rendering media to disk.

Playlist Improvements

Chronotron works best with touch input and the Surface Dial, though I’m aware that many of you run the app on a regular PC with a mouse. Now, when hovering the mouse over playlist items, a checkbox appears that allows you to select the item in just one click.

The Playlist pane underwent some additional revamping – regardless of the input method – based on customer feedback. A Select All button has been added. While in selection mode, if all items are unchecked then the selection mode is turned off automatically. Finally, clicking on the item that is currently playing restarts playback form the beginning of the track.

Usability Improvements

In Release 99 a couple of switches were moved from the main panes to the Options pane (refer to the change log for details). This time it’s the Audio Scroller switch that moved to Options, under the Appearance section. This also means that now you can make the scroller always visible without having to flip the switch every time you start the app.

Also, as part of the continuous effort to make the UI more intuitive, the Instrument pane has been made more readable. Take a look at the two screenshots below.

Can you spot the difference? The one at the left is the new screen layout. Before this change, the user needed to click on the Instrument dropdown list just to see which instruments were available (most customers didn’t even notice when Bass Guitar was added in Release 98!). The Layout options now appear in a dropdown list for the sake of saving screen real estate, but this should pose no usability challenge as the other selection choices are obvious.

By the way, the same principle was applied to the Solo Channel function in the Audio Adjustments pane.

Other Changes

The advent of Always-Connected PCs (ACPC) running full Windows 10 on ARM is a new challenge for app developers. Even though I don’t expect many musicians to use an ACPC as their main system, as a Windows developer I aim to reaching as many Windows devices as possible. This is why almost every Chronotron update brings performance improvements on ARM CPUs, and Release 100 is no exception.

Last, but not least, in this release there are also few changes under the hood to support the new features and pave the way for upcoming functionality. For example, having tighter control on video frames opens the door to other kinds of video processing.

I hope you will enjoy using this release as much as I did coding it!

The wide variety of Windows-compatible hardware out there poses a challenge to developers of apps that rely heavily on device CPU and GPU capabilities, let alone the developers of the OS itself. In apps like video games and media players, the configuration dialog always has a couple of settings whose sole purpose is to accommodate for platform idiosyncrasies or even driver bugs.

In Chronotron, such settings can be found under the Performance section in the Options pane.

While the defaults were carefully chosen to make the app run fine on virtually any hardware that supports Windows 10, you can still fine-tune these parameters to get the most out of your system. A detailed documentation of the various configuration options – not just performance-related – can be found here.

The Fast PC

If you have a fast, modern PC, any combination of settings will likely work great.

Still, you may want to crank up audio quality to enjoy better note definition, provided that your sound system lets you hear the difference. There’s one gotcha with the Highest quality setting, though: as mentioned in the documentation, formant preservation uses a more accurate algorithm that may produce sound artifacts on non-vocal-only audio material, so if you use Chronotron to transpose entire songs, it may be better to stick to Very High quality instead of Highest.

Using the alternative playback engine comes in handy if your system has multiple sound cards, because you will be able to switch between audio outputs on the fly (for example, between the main boxes and the headphones).

Disabling audio processing on multiple CPU cores may also help if you want to run other CPU-demanding apps side-by-side with Chronotron.

The Small Tablet or Netbook

It is on more modest systems that tweaking some of these settings can make a real difference. Many tablets and netbooks have limited memory capacity and relatively slow CPU cores – albeit a reasonable amount of them – so one of the goals here is to distribute workload evenly across processing units. Another goal is to reduce the app memory footprint as much as possible.

First, enable audio processing on multiple CPU cores, and make sure video hardware acceleration is also enabled so the app offloads some of the video processing work to the GPU.

If you use the Hold mode frequently, you can further reduce memory pressure by limiting the maximum reverse playback length to 2 seconds. You may also want to choose not to display the waveform in the scroller.

As a last resort, decreasing audio quality to Very Good may give your CPU some more breath. Alternatively, switching Solo Channel to MONO during playback – via the Audio Adjustments pane – will cut CPU usage roughly by half without making any audible difference in such devices, unless you’re wearing headphones.

What About the Other Performance Settings?

Seamless Loop and Low-latency Playback – both of which are enabled by default – are there for troubleshooting purposes. If you experience playback stability issues these are the ones to look at.

Casting shadows on transparent controls improves the readability of on-screen app elements when playing videos having a white background, for example. However, enabling this option has a significant impact on CPU and memory usage, so do it only if it is absolutely required for your usage.

As a final word, note that the app can be customized in many ways that I haven’t covered in this post. Reading the documentation will give you some ideas – and because default values are also documented, there’s no reason not to try – so go ahead and pimp your Chronotron!