Its app icon resembles a multicolored musical note (♫) on a white background.  If prompted to update iTunes, first click Download iTunes and wait for the update to finish installing. You'll need to restart your computer after doing so. If you already have the ringtone on your iPhone, skip ahead to setting the ringtone. You'll need to use iTunes to trim the song that you want to use as a ringtone. You can add the song to iTunes by double-clicking its file if iTunes is your computer's default music player. If iTunes isn't your computer's default music player, you can add the song by clicking the File tab, clicking Add File to Library... in the drop-down menu, and double-clicking the music file that you want to use. Double-click the song in iTunes to play it, listen for the beginning of the section that you want to use as the ringtone and note the start time, and listen for up to 40 seconds before noting the end time.  You can see the time-stamp for the song at the top of the iTunes window when a song is playing. Ringtones cannot be longer than 40 seconds. Click the song to select it, click Edit (Windows) or File (Mac), and click Song Info (Windows) or Get Info (Mac) in the resulting drop-down menu. A window will open. You can also just right-click the song and click Song Info (Windows) or Get Info (Mac) in the drop-down menu that appears. It's at the top of the information menu window. They're both near the top of the window, just below the "media kind" section. Doing so will place checkmarks in the respective boxes, allowing you to change the start and stop time for the song. In the "start" text box, enter the time in the song at which you want the ringtone to start, then do the same with the point at which you want the ringtone to end in the "stop" box. It's at the bottom of the window. This will save the song's changes and exit the information menu. Make sure that the song is selected by clicking it, then click File, select Convert in the drop-down menu, and click Create AAC Version in the pop-out menu. A...

===
Write a summary of the previous text in Hindi:
आईट्यून्स खोलें: आपका गाना आईट्यून्स पर मौजूद होने की पुष्टि करें: आप गाने के जिस भाग का इस्तेमाल करना चाहते हैं, उसे चुनें: गाने की जानकारी वाला मेन्यू खोलें: Options टैब पर क्लिक करें: "start" और "stop" बॉक्स पर चैक करें: गाने के शुरू होने और रुकने का समय एंटर करें: OK पर क्लिक करें: गाने के AAC वर्जन को तैयार करें: AAC फाइल की लोकेशन पर जाएँ: AAC फाइल को M4R फाइल में बदलें: यह प्रक्रिया, विंडोज कंप्यूटर और मैक कंप्यूटर दोनों पर अलग-अलग होती है: