Based on the information you've provided, here are some specific briefing questions that you may find useful when communicating with your graphic designer:
Can you illustrate the "indie vibe" using bold colors while maintaining the vibrancy and energy of a music festival?
How will you visually depict the atmosphere of a music festival to appeal to young adults interested in indie music?
What are some creative ways to convey the message "Join the biggest indie music festival" using visual elements in the poster design?
Considering the A3 format, how would you balance the use of imagery and text to ensure the design isn't overcrowded yet informative?
How would you use modern and bold typography to highlight the key details of the festival, ensuring they are easily readable?
Can you incorporate images from last year's festival into the design to show the success and atmosphere of the event?
How can you leverage recent design trends, such as the use of abstract shapes and vibrant colors, while keeping the design unique to our festival?
Given that our festival seeks to bring indie music mainstream, how can the design reflect this objective?
Can you create a design that feels exciting and engaging, motivating our target audience to attend the festival?
How would you ensure the final design is optimized for high-quality printing in JPEG format?
Remember, these are guiding questions. Your graphic designer's creative process may lead to additional questions or require further clarification on specific points. A good briefing also includes space for the designer's creativity and expertise.