Marianne Martinez
Scratch is a platform that enables users to make games, stories, and interactive art. One of the features available on Scratch is the ability to pan and zoom on the backdrop. This allows users to create a dynamic viewing experience, enhancing the visual appeal of their projects. While the ''pan' block has been deleted, users can still achieve panning and zooming effects through custom blocks. Additionally, Scratch offers sound effects, such as the pan left/right effect, which allows users to adjust the pan position of sounds, creating a sense of spatial audio. This effect has a range of -100 to 100, with higher numbers corresponding to a higher pitch and lower numbers to a lower pitch.
| Characteristics | Values |
|---|---|
| Panning in Scratch | Zoom in and pan on the backdrop, with sprites locked to the backdrop and not the screen |
| Pan block range | Minimum of -100, maximum of 100 |
| Sound effect | Changes the pitch of sounds |
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What You'll Learn
Backdrop panning and zooming in Scratch
Backdrop panning and zooming can be a great feature in Scratch, allowing creators to zoom in and pan on the backdrop, with sprites locked to the backdrop and not the screen.
To create a backdrop or sprite in Scratch, you can use one of four methods. The first is to import a background or sprite from the Scratch library. The second is to import a sprite file from your computer. The third is to import a graphics file to use as a backdrop or costume and then use the costume to create a sprite. The fourth is to draw your backdrop or costume using Scratch's drawing tools and then use costumes to create your sprite.
To create a zoom effect on a sprite, you can use the following script:
> when gf clicked
> set size to (. . .::grey)%
> forever if <
> repeat until <(size) = (. . .::grey)>//Make sure this number is less than the sprite's size limit or this script will break.
> change size by (. . .::grey)//Make sure this number is less than the sprite's size limit or this script will break.
> end else
> repeat until <(size) = (. . .::grey)>// Set this to the regular size.
To create a zoom effect on a backdrop, you can duplicate the backdrop and select a central portion of it to fill the whole backdrop. Repeating this process a few times will create a zooming effect when switching between the backdrops.
While Scratch does not have a pan block, users have suggested that the following blocks could be used to create a panning effect:
> zoom in ()% // category=looks
> zoom out ()% // category=looks
> pan [up v] () // category=motion
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Scratch Wiki's pan effect block
The pan effect block is a sound block in Scratch that controls the panning of a sound, or in other words, its perceived position in a stereo field. The block has a drop-down menu with options for "pan left/right" and "pitch". The input value sets the intensity of the effect. A value of -100 sends all the sound to the left ear, while a value of 100 sends it all to the right ear. Values between -100 and 100 will adjust the pan position accordingly, with 0 being the centre position where the sound plays normally in both ears.
The pan effect block is useful for creating directional audio, which plays a sound in the direction of what is making the sound relative to the player. This effect is more noticeable when using headphones, speakers, or earbuds, although some computers do support this function.
Like the pitch effect block, the pan effect block has limits. The minimum value is -100 and the maximum is 100. Setting the effect to a value higher or lower than these limits will not change how the sound shifts any more than setting it to -100 or 100.
Sound blocks are one of ten categories of blocks in Scratch, which also include motion, looks, event, control, sensing, operators, variables, list, and my blocks. Sound blocks control sound and are used to play, start, or stop sounds, change volume, and apply sound effects.
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Sound effects in Scratch
To upload a sound, click on the "Upload Sound" option and select the desired sound file from your device. Scratch also has a variety of pre-recorded sounds ready for use. To choose these sound effects, click the "add sound" symbol in the bottom left and select a sound from the categories or by using the search bar. After selecting a sound, users will be taken back to the "Sounds" tab, where they can see the sound they have just added.
Each sprite, even the background, has its sound effect option. To add a sound effect, select the sprite or background and click on the "Sounds" tab. In the play sound block, choose the sound imported or selected from the Scratch library. Users can then decide where they want the sound effects to play in their project. The sound effect can be triggered when a sprite is clicked, when a certain event occurs, or at regular intervals.
Users can also experiment with different sound effects and combinations to enhance the interactivity and enjoyment of their Scratch projects. Scratch offers the ability to change the speed and volume of sounds or play around with effects like fade in/out. Scratch 3.0 beta also included four other effects: Echo, Reverb, Fuzz, and Robot. However, these effects were removed on June 23, 2017, and were not included in the final release of Scratch 3.0.
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Scratch 3.0 beta effects
Scratch 3.0 was released as a preview on January 18, 2018, with a beta version released on August 1, 2018. The beta version was made available at beta.scratch.mit.edu and included new extensions, as well as the creation of the Scratch 3.0 Beta forum. The forum was designed to allow Scratchers to provide feedback, share ideas, and report bugs.
During the beta phase, several bugs were fixed, and the platform was designed to be easier to build on than Scratch 2.0. The Scratch Team also announced a partnership with Google, along with the introduction of Scratch Blocks, which serves as the graphical user interface for the programming language.
In terms of specific effects, the pan effect block has limits. The minimum the pan effect can go is -100, and the maximum is 100. Setting the effect beyond these values does not further change how the sound will shift. In the Scratch 3.0 beta, there were four other effects: Echo, Reverb, Fuzz, and Robot. However, these effects were removed on June 23, 2017, and were not included in the final release of Scratch 3.0.
The sound effect blocks were added around October 2016, and the pitch effect was introduced alongside the pan left/right effect. The pitch effect changes the pitch and speed of sounds, with higher numbers resulting in higher pitches and faster speeds. Positive values shift the audio higher, while negative values shift it lower.
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Scratch's privacy policy
Scratch has a detailed privacy policy in place to protect its users' personal information. The policy was last updated on May 25, 2023, and is more detailed than its previous iteration. The policy outlines when and why Scratch collects personal information, and how this information is used.
Personal information is defined as any data that is connected or related to an individual. Scratch collects personal information to monitor and improve the Scratch website. This includes information such as a user's location and activities on the site. This data is collected by Scratch and third-party service providers, such as Google Analytics, through the use of cookies. Cookies are small data files that are stored on a user's computer and help Scratch deliver its services. Users can decline the use of cookies through their browser settings, however, this may impact their ability to use the Scratch website.
Users are encouraged to review the privacy policy regularly and any material changes to the policy will be communicated through the site or via email. Scratch is based in the United States, and user information may be transferred to and stored by affiliates, partners, or service providers inside or outside the EEA. To protect their privacy, users should refrain from sharing personal contact information, such as names, addresses, or phone numbers, on the Scratch website.
For users who wish to use Scratch without submitting personal information, the Offline Editor can be downloaded. Projects created in the Offline Editor are not accessible by the Scratch Team and do not disclose any personally identifying information unless uploaded to the Scratch website. Users can contact the Scratch Foundation at [email protected] for any queries related to the privacy policy or to exercise their rights regarding their personal information.
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Frequently asked questions
The pan block is a sound effect that changes the pan of sounds, i.e., the left-right balance of the sound.
The minimum the pan effect can go is -100 and the maximum is 100. Setting the effect to a higher or lower value does not change how the sound will shift any more than setting it to -100 or 100.
The 'pan' block is used to change the left-right balance of a sound. For example, to pan a sound left, you would use the code: "set [pan left/right v] effect to (-100):: sound start sound (Meow v)".
